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# Function ifElse
Execute a conditional expression.
## Syntax
```js
math.ifElse(condition, trueExpr, falseExpr)
```
### Parameters
Parameter | Type | Description
--------- | ---- | -----------
`condition` | Number | Boolean | String | Complex | BigNumber | Unit | The conditional expression
`trueExpr` | * | The true expression
`falseExpr` | * | The false expression
### Returns
Type | Description
---- | -----------
* | The evaluated return expression
## Examples
```js
var math = mathjs();
math.ifElse(true, 'yes', 'no'); // returns 'yes'
```
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