freeCodeCamp/use-the-parseint-function.english.md at ab4367a751ac75ca42fea9a8dd2211adab9dd273

Valeriy 79d9012432 fix(curriculum): quotes in tests (#18828 )

* fix(curriculum): tests quotes

* fix(curriculum): fill seed-teardown

* fix(curriculum): fix tests and remove unneeded seed-teardown

2018-10-20 23:32:47 +05:30

1.9 KiB

Raw Blame History

id, title, challengeType

id	title	challengeType
587d7b7e367417b2b2512b23	Use the parseInt Function	1

Description

The parseInt() function parses a string and returns an integer. Here's an example: var a = parseInt("007"); The above function converts the string "007" to an integer 7. If the first character in the string can't be converted into a number, then it returns NaN.

Instructions

Use parseInt() in the convertToInteger function so it converts the input string str into an integer, and returns it.

Tests

tests:
  - text: <code>convertToInteger</code> should use the <code>parseInt()</code> function
    testString: assert(/parseInt/g.test(code), '<code>convertToInteger</code> should use the <code>parseInt()</code> function');
  - text: <code>convertToInteger("56")</code> should return a number
    testString: assert(typeof(convertToInteger("56")) === "number", '<code>convertToInteger("56")</code> should return a number');
  - text: <code>convertToInteger("56")</code> should return 56
    testString: assert(convertToInteger("56") === 56, '<code>convertToInteger("56")</code> should return 56');
  - text: <code>convertToInteger("77")</code> should return 77
    testString: assert(convertToInteger("77") === 77, '<code>convertToInteger("77")</code> should return 77');
  - text: <code>convertToInteger("JamesBond")</code> should return NaN
    testString: assert.isNaN(convertToInteger("JamesBond"), '<code>convertToInteger("JamesBond")</code> should return NaN');

Challenge Seed

function convertToInteger(str) {

}

convertToInteger("56");

Solution

function convertToInteger(str) {
  return parseInt(str);
}

1.9 KiB Raw Blame History