Initial commit

07-printf/01-intro/01-println-vs-printf/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+func main() {
+	ops, ok, fail := 2350, 543, 433
+
+	fmt.Println(
+		"total:", ops, "- success:", ok, "/", fail,
+	)
+
+	fmt.Printf(
+		"total: %d - success: %d / %d\n",
+		ops, ok, fail,
+	)
+}

07-printf/01-intro/02/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+func main() {
+	var brand string
+
+	// prints the string in quoted-form like this ""
+	fmt.Printf("%q\n", brand)
+
+	brand = "Google"
+	fmt.Printf("%q\n", brand)
+}

07-printf/02-escape-sequences/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+func main() {
+	// without newline
+	fmt.Println("hihi")
+
+	// with newline:
+	//   \n = escape sequence
+	//   \  = escape character
+	fmt.Println("hi\nhi")
+
+	// escape characters:
+	//   \\ = \
+	//   \" = "
+	fmt.Println("hi\\n\"hi\"")
+}

07-printf/03-printing-types/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+func main() {
+	// I'm using multiple declaration instead of singular
+	var (
+		speed int
+		heat  float64
+		off   bool
+		brand string
+	)
+
+	fmt.Printf("%T\n", speed)
+	fmt.Printf("%T\n", heat)
+	fmt.Printf("%T\n", off)
+	fmt.Printf("%T\n", brand)
+}

07-printf/04-coding/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+func main() {
+	var (
+		planet   = "venus"
+		distance = 261
+		orbital  = 224.701
+		hasLife  = false
+	)
+
+	// swiss army knife %v verb
+	fmt.Printf("Planet: %v\n", planet)
+	fmt.Printf("Distance: %v millions kms\n", distance)
+	fmt.Printf("Orbital Period: %v days\n", orbital)
+	fmt.Printf("Does %v have life? %v\n", planet, hasLife)
+
+	// argument indexing - indexes start from 1
+	fmt.Printf(
+		"%v is %v away. Think! %[2]v kms! %[1]v OMG.\n",
+		planet, distance,
+	)
+
+	// why use other verbs than? because: type-safety
+	// uncomment to see the warnings:
+	//
+	// fmt.Printf("Planet: %d\n", planet)
+	// fmt.Printf("Distance: %s millions kms\n", distance)
+	// fmt.Printf("Orbital Period: %t days\n", orbital)
+	// fmt.Printf("Does %v has life? %f\n", planet, hasLife)
+
+	// correct verbs:
+	// fmt.Printf("Planet: %s\n", planet)
+	// fmt.Printf("Distance: %d millions kms\n", distance)
+	// fmt.Printf("Orbital Period: %f days\n", orbital)
+	// fmt.Printf("Does %s has life? %t\n", planet, hasLife)
+
+	// precision
+	fmt.Printf("Orbital Period: %f days\n", orbital)
+	fmt.Printf("Orbital Period: %.0f days\n", orbital)
+	fmt.Printf("Orbital Period: %.1f days\n", orbital)
+	fmt.Printf("Orbital Period: %.2f days\n", orbital)
+}

07-printf/exercises/01/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+// ---------------------------------------------------------
+// EXERCISE
+//  Print your age using Prinft
+//
+// EXPECTED OUTPUT
+//  My age is 30 years old.
+//
+// NOTE
+//  You should change 30 to your age, of course.
+// ---------------------------------------------------------
+
+func main() {
+	// ?
+}

07-printf/exercises/01/solution/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Printf("My age is %d years old.\n", 30)
+}

07-printf/exercises/02/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+// ---------------------------------------------------------
+// EXERCISE
+//  Print your name and lastname using Printf
+//
+// EXPECTED OUTPUT
+//  My name is Inanc and my lastname is Gumus.
+//
+// BONUS
+//  Store the formatting specifier (first argument of Printf)
+//    in a variable.
+//  Then pass it to printf
+// ---------------------------------------------------------
+
+func main() {
+	// BONUS: Use a variable for the format specifier
+
+	// fmt.Printf("?", ?, ?)
+}

07-printf/exercises/02/solution/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Printf("My name is %s and my lastname is %s.\n", "Inanc", "Gumus")
+
+	// BONUS
+	msg := "My name is %s and my lastname is %s.\n"
+	fmt.Printf(msg, "Inanc", "Gumus")
+}

07-printf/exercises/03/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+// ---------------------------------------------------------
+// EXERCISE
+//  Use printf to print the expected output using a variable.
+//
+// EXPECTED OUTPUT
+//  These are false claims.
+// ---------------------------------------------------------
+
+func main() {
+	// UNCOMMENT THE FOLLOWING CODE
+	// AND DO NOT CHANGE IT AFTERWARDS
+	// tf := false
+
+	// TYPE YOUR CODE HERE
+	// ?
+}

07-printf/exercises/03/solution/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+func main() {
+	tf := false
+	fmt.Printf("These are %t claims.\n", tf)
+}

07-printf/exercises/04/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+// ---------------------------------------------------------
+// EXERCISE
+//  Print the current temperature in your area using Printf
+//
+// NOTE
+//  Do not use %v verb
+//  Output "shouldn't" be like 29.500000
+//
+// EXPECTED OUTPUT
+//  Temperature is 29.5 degrees.
+// ---------------------------------------------------------
+
+func main() {
+	// ?
+}

07-printf/exercises/04/solution/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Printf("Temperature is %.1f degrees.\n", 29.5)
+}

07-printf/exercises/05/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+// ---------------------------------------------------------
+// EXERCISE
+//  Print "hello world" with double-quotes using Printf
+//  (As you see here)
+//
+// NOTE
+//  Output "shouldn't" be just: hello world
+//
+// EXPECTED OUTPUT
+//  "hello world"
+// ---------------------------------------------------------
+
+func main() {
+	// ?
+}

07-printf/exercises/05/solution/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Printf("%q\n", "hello world")
+}

07-printf/exercises/06/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+// ---------------------------------------------------------
+// EXERCISE
+//  Print the type and value of 3 using fmt.Printf
+//
+// EXPECTED OUTPUT
+//  Type of 3 is int
+// ---------------------------------------------------------
+
+func main() {
+	// ?
+}

07-printf/exercises/06/solution/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Printf("Type of %d is %T\n", 3, 3)
+}

07-printf/exercises/07/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+// ---------------------------------------------------------
+// EXERCISE
+//  Print the type and value of 3.14 using fmt.Printf
+//
+// EXPECTED OUTPUT
+//  Type of 3.14 is float64
+// ---------------------------------------------------------
+
+func main() {
+	// ?
+}

07-printf/exercises/07/solution/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Printf("Type of %f is %T\n", 3.14, 3.14)
+}

07-printf/exercises/08/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+// ---------------------------------------------------------
+// EXERCISE
+//  Print the type and value of "hello" using fmt.Printf
+//
+// EXPECTED OUTPUT
+// 	Type of hello is string
+// ---------------------------------------------------------
+
+func main() {
+	// ?
+}

07-printf/exercises/08/solution/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Printf("Type of %s is %T\n", "hello", "hello")
+}

07-printf/exercises/09/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+// ---------------------------------------------------------
+// EXERCISE
+//  Print the type and value of true using fmt.Printf
+//
+// EXPECTED OUTPUT
+//  Type of true is bool
+// ---------------------------------------------------------
+
+func main() {
+	// ?
+}

07-printf/exercises/09/solution/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Printf("Type of %t is %T\n", true, true)
+}

07-printf/exercises/10/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+// ---------------------------------------------------------
+// EXERCISE
+//  1. Get your name and lastname from the command-line
+//  2. Print them using Printf
+//
+// EXAMPLE INPUT
+//  Inanc Gumus
+//
+// EXPECTED OUTPUT
+//  Your name is Inanc and your lastname is Gumus.
+// ---------------------------------------------------------
+
+func main() {
+	// BONUS: Use a variable for the format specifier
+}

07-printf/exercises/10/solution/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func main() {
+	// WARNING: This program will error
+	//          if you don't pass your name and lastname
+
+	name, lastname := os.Args[1], os.Args[2]
+
+	msg := "Your name is %s and your lastname is %s.\n"
+	fmt.Printf(msg, name, lastname)
+}

07-printf/questions/questions.md

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+## Which code is correct?
+* `fmt.Printf("Hi %s")`
+* `fmt.Printf("Hi %s", "how", "are you")`
+* `fmt.Printf("Hi %s", "hello")` *CORRECT*
+* `fmt.Printf("Hi %s", true)`
+
+## Which code is correct?
+* `fmt.Printf("Hi %s %s", "there")`
+* `fmt.Printf("Hi %s %s", "5", true)`
+* `fmt.Printf("Hi %s %s", "there", ".")` *CORRECT*
+* `fmt.Printf("Hi %s %s", "true", false)`
+
+## Which verb is used for an int value?
+* %f
+* %d *CORRECT*
+* %s
+* %t
+
+## Which verb is used for a float value?
+* %f *CORRECT*
+* %d
+* %s
+* %t
+
+## Which verb is used for a string value?
+* %f
+* %d
+* %s *CORRECT*
+* %t
+
+## Which verb is used for a bool value?
+* %f
+* %d
+* %s
+* %t *CORRECT*
+
+## Which verb you can use for any type of value?
+* %f
+* %d
+* %v *CORRECT*
+* %t
+
+## What does "\n" print?
+* \n
+* Prints a newline *CORRECT*
+* Prints an empty string
+
+## What does "\\n" print?
+* \n *CORRECT*
+* Prints a newline
+* Prints an empty string
+
+## What does "c:\\secret\\directory" print?
+* "c:\\secret\\directory"
+* c:\\secret\\directory
+* c:\secret\directory *CORRECT*
+
+## What does "\"heisenberg\"" print?
+* ERROR
+* heisenberg
+* "heisenberg" *CORRECT*
+* 'heisenberg'
+
+## What does `fmt.Printf("%T", 3.14)` print?
+* ERROR
+* int
+* float64 *CORRECT*
+* string
+* bool
+
+## What does `fmt.Printf("%T", true)` print?
+* ERROR
+* int
+* float64
+* string
+* bool *CORRECT*
+
+## What does `fmt.Printf("%T", 42)` print?
+* ERROR
+* int *CORRECT*
+* float64
+* string
+* bool
+
+## What does `fmt.Printf("%T", "hi")` print?
+* ERROR
+* int
+* float64
+* string *CORRECT*
+* bool