freeCodeCamp/use-the-conditional-ternary-operator.english.md at e9212c61d299684086475561c37d84fa066bdca9

Randell Dawson e9212c61d2 fix(curriculum): Remove unnecessary assert message argument from English challenges JavaScript Algorithms and Data Structures - 01 (#36401 )

* fix: rm assert msg basic-javascript

* fix: removed more assert msg args

* fix: fixed verbiage

Co-Authored-By: Parth Parth <34807532+thecodingaviator@users.noreply.github.com>

2019-07-13 08:07:53 +01:00

1.8 KiB

Raw Blame History

id, title, challengeType, videoUrl

id	title	challengeType	videoUrl
587d7b7e367417b2b2512b24	Use the Conditional (Ternary) Operator	1	https://scrimba.com/c/c3JRmSg

Description

The conditional operator, also called the ternary operator, can be used as a one line if-else expression. The syntax is: condition ? statement-if-true : statement-if-false; The following function uses an if-else statement to check a condition:

function findGreater(a, b) {
  if(a > b) {
    return "a is greater";
  }
  else {
    return "b is greater";
  }
}

This can be re-written using the conditional operator:

function findGreater(a, b) {
  return a > b ? "a is greater" : "b is greater";
}

Instructions

Use the conditional operator in the checkEqual function to check if two numbers are equal or not. The function should return either "Equal" or "Not Equal".

Tests

tests:
  - text: <code>checkEqual</code> should use the <code>conditional operator</code>
    testString: assert(/.+?\s*?\?\s*?.+?\s*?:\s*?.+?/.test(code));
  - text: <code>checkEqual(1, 2)</code> should return "Not Equal"
    testString: assert(checkEqual(1, 2) === "Not Equal");
  - text: <code>checkEqual(1, 1)</code> should return "Equal"
    testString: assert(checkEqual(1, 1) === "Equal");
  - text: <code>checkEqual(1, -1)</code> should return "Not Equal"
    testString: assert(checkEqual(1, -1) === "Not Equal");

Challenge Seed

function checkEqual(a, b) {

}

checkEqual(1, 2);

Solution

function checkEqual(a, b) {
  return a === b ? "Equal" : "Not Equal";
}

1.8 KiB Raw Blame History