freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/storing-values-with-the-assignment-operator.english.md

id	title	challengeType
56533eb9ac21ba0edf2244a8	Storing Values with the Assignment Operator	1

Description

In JavaScript, you can store a value in a variable with the assignment operator. myVariable = 5; This assigns the Number value 5 to myVariable. Assignment always goes from right to left. Everything to the right of the = operator is resolved before the value is assigned to the variable to the left of the operator.

myVar = 5;
myNum = myVar;

This assigns 5 to myVar and then resolves myVar to 5 again and assigns it to myNum.

Instructions

Assign the value 7 to variable a. Assign the contents of a to variable b.

Tests

tests:
  - text: Do not change code above the line
    testString: 'assert(/var a;/.test(code) && /var b = 2;/.test(code), "Do not change code above the line");'
  - text: <code>a</code> should have a value of 7
    testString: 'assert(typeof a === "number" && a === 7, "<code>a</code> should have a value of 7");'
  - text: <code>b</code> should have a value of 7
    testString: 'assert(typeof b === "number" && b === 7, "<code>b</code> should have a value of 7");'
  - text: <code>a</code> should be assigned to <code>b</code> with <code>=</code>
    testString: 'assert(/b\s*=\s*a\s*;/g.test(code), "<code>a</code> should be assigned to <code>b</code> with <code>=</code>");'

Challenge Seed

// Setup
var a;
var b = 2;

// Only change code below this line

Before Test

if (typeof a != 'undefined') {
  a = undefined;
}
if (typeof b != 'undefined') {
  b = undefined;
}

After Test

console.info('after the test');

Solution

var a;
var b = 2;
a = 7;
b = a;