# cdfStudent {#cdfstudent}

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

## Syntax {#syntax}

`cdfStudent(df, X)`

## Arguments {#arguments}

**df** is a positive floating number indicating the degree of freedom of a Student's t-distribution.

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

## Details {#details}

Return the value of the cumulative distribution function of a Student's t-distribution.

## Examples {#examples}

```python
cdfStudent(1, [-1, 0, 0.5, 1, 2]);
// output: [0.25, 0.5, 0.647584, 0.75, 0.852416]

cdfStudent(1, [0.1, 0.3, 0.5, 0.7, 0.9]);
// output: [0.531726, 0.592774, 0.647584, 0.6944, 0.733262]
```

