modeling-app/docs/kcl-std/functions/std-math-rem.md

---
title: "rem"
subtitle: "Function in std::math"
excerpt: ""
layout: manual
---



```kcl
rem(
  @num: number,
  divisor: number,
): number
```

Compute the remainder after dividing `num` by `div`.
If `num` is negative, the result will be too.

### Arguments

| Name | Type | Description | Required |
|----------|------|-------------|----------|
| `num` | [`number`](/docs/kcl-std/types/std-types-number) | The number which will be divided by `divisor`. | Yes |
| `divisor` | [`number`](/docs/kcl-std/types/std-types-number) | The number which will divide `num`. | Yes |

### Returns

[`number`](/docs/kcl-std/types/std-types-number) - A number.


### Examples

```kcl
import rem from "std::math"

assert(rem( 7,    divisor =   4), isEqualTo =   3, error = "remainder is 3")
assert(rem(-7,    divisor =   4), isEqualTo =  -3, error = "remainder is -3")
assert(rem( 7,    divisor =  -4), isEqualTo =   3, error = "remainder is 3")
assert(rem( 6,    divisor = 2.5), isEqualTo =   1, error = "remainder is 1")
assert(rem( 6.5,  divisor = 2.5), isEqualTo = 1.5, error = "remainder is 1.5")
assert(rem( 6.5,  divisor =   2), isEqualTo = 0.5, error = "remainder is 0.5")
```

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