42 lines
777 B
Markdown
42 lines
777 B
Markdown
---
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title: math.ldexp() function
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description: The math.ldexp() function is the inverse of `math.frexp()`. It returns `frac × 2**exp`.
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menu:
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v2_0_ref:
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name: math.ldexp
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parent: Math
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weight: 301
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---
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The `math.ldexp()` function is the inverse of [`math.frexp()`](/v2.0/reference/flux/functions/math/frexp).
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It returns `frac × 2**exp`.
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_**Output data type:** Float_
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```js
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import "math"
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math.ldexp(frac: 0.5, exp: 6)
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// Returns 32.0
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```
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## Parameters
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### frac
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The fraction used in the operation.
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_**Data type:** Float_
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### exp
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The exponent used in the operation.
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_**Data type:** Integer_
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## Special cases
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```js
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math.ldexp(frac: ±0, exp:exp) // Returns ±0
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math.ldexp(frac: ±Inf, exp:exp) // Returns ±Inf
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math.ldexp(frac: NaN, exp:exp) // Returns NaN
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```
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