freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/assigning-the-value-of-one-variable-to-another.md

id, title, challengeType, videoUrl, forumTopicId, dashedName

id	title	challengeType	videoUrl	forumTopicId	dashedName
5ee127a03c3b35dd45426493	Assigning the Value of One Variable to Another	1		418265	assigning-the-value-of-one-variable-to-another

--description--

After a value is assigned to a variable using the assignment operator, you can assign the value of that variable to another variable using the assignment operator.

var myVar;
myVar = 5;
var myNum;
myNum = myVar;

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.

--instructions--

Assign the contents of a to variable b.

--hints--

You should not change code above the specified comment.

assert(/var a;/.test(code) && /a = 7;/.test(code) && /var b;/.test(code));

b should have a value of 7.

assert(typeof b === 'number' && b === 7);

a should be assigned to b with =.

assert(/b\s*=\s*a\s*/g.test(code));

--seed--

--before-user-code--

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

--after-user-code--

(function(a, b) {
  return 'a = ' + a + ', b = ' + b;
})(a, b);

--seed-contents--

// Setup
var a;
a = 7;
var b;

// Only change code below this line

--solutions--

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