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60 lines
1.5 KiB
Markdown
60 lines
1.5 KiB
Markdown
# Function equal
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Test whether two values are equal.
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The function tests whether the relative difference between x and y is
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smaller than the configured epsilon. The function cannot be used to
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compare values smaller than approximately 2.22e-16.
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For matrices, the function tests whether the size and all elements of the
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matrices are equal (a deep comparison).
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In case of complex numbers, x.re must equal y.re, and x.im must equal y.im.
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## Syntax
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```js
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math.equal(x, y)
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```
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### Parameters
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Parameter | Type | Description
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--------- | ---- | -----------
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`x` | Number | BigNumber | Boolean | Complex | Unit | String | Array | Matrix | First value to compare
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`y` | Number | BigNumber | Boolean | Complex | Unit | String | Array | Matrix | Second value to compare
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### Returns
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Type | Description
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---- | -----------
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Boolean | Array | Matrix | Returns true when the compared values are equal, else returns false
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## Examples
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```js
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var math = mathjs();
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math.equal(2 + 2, 3); // returns false
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math.equal(2 + 2, 4); // returns true
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var a = math.unit('50 cm');
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var b = math.unit('5 m');
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math.equal(a, b); // returns true
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```
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## See also
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[unequal](unequal.md),
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[smaller](smaller.md),
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[smallerEq](smallerEq.md),
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[larger](larger.md),
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[largerEq](largerEq.md),
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[compare](compare.md),
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[dotEqual](dotEqual.md)
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