105 lines
1.8 KiB
Markdown
105 lines
1.8 KiB
Markdown
---
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id: 5ee127a03c3b35dd45426493
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title: Assigning the Value of One Variable to Another
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challengeType: 1
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videoUrl: ''
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forumTopicId: 418265
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---
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## Description
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<section id='description'>
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After a value is assigned to a variable using the <dfn>assignment</dfn> operator, you can assign the value of that variable to another variable using the <dfn>assignment</dfn> operator.
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```js
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var myVar;
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myVar = 5;
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var myNum;
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myNum = myVar;
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```
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The above declares a `myVar` variable with no value, then assigns it the value `5`. Next, a variable named `myNum` is declared with no value. Then, the contents of `myVar` (which is `5`) is assigned to the variable `myNum`. Now, `myNum` also has the value of `5`.
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</section>
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## Instructions
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<section id='instructions'>
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Assign the contents of <code>a</code> to variable <code>b</code>.
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: You should not change code above the specified comment.
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testString: assert(/var a;/.test(code) && /a = 7;/.test(code) && /var b;/.test(code));
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- text: <code>b</code> should have a value of 7.
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testString: assert(typeof b === 'number' && b === 7);
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- text: <code>a</code> should be assigned to <code>b</code> with <code>=</code>.
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testString: assert(/b\s*=\s*a\s*/g.test(code));
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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// Setup
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var a;
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a = 7;
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var b;
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// Only change code below this line
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```
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</div>
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### Before Test
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<div id='js-setup'>
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```js
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if (typeof a != 'undefined') {
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a = undefined;
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}
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if (typeof b != 'undefined') {
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b = undefined;
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}
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```
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</div>
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### After Test
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<div id='js-teardown'>
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```js
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(function(a, b) {
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return 'a = ' + a + ', b = ' + b;
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})(a, b);
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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var a;
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a = 7;
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var b;
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b = a;
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```
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</section>
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