# cdfNormal {#cdfnormal}

**Parent topic:**[Functions](../../Functions/category.md)

## Syntax {#syntax}

`cdfNormal(mean, stdev, X)`

## Arguments {#arguments}

**mean** is the mean of a normal distribution.

**stdev** is the standard deviation of a normal distribution.

**X** is a numeric scalar or vector.

## Details {#details}

Return the value of the cumulative distribution function of a normal distribution.

## Examples {#examples}

```
cdfNormal(0,1,-2.33);
// output: 0.009903

cdfNormal(10, 20, -30);
// output: 0.02275
```

