# isMonotonicIncreasing {#ismonotonicincreasing}

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

## Syntax {#syntax}

`isMonotonicIncreasing(X)`

Alias: `isMonotonic`

## Arguments {#arguments}

**X** is a scalar/vector.

## Details {#details}

Check whether the elements in *X* are monotonically increasing.

## Examples {#examples}

```
a = [2023.01M,2023.02M,2023.03M,2023.04M,2023.05M,2023.06M]
isMonotonicIncreasing(a);
// output: true

a = [1,3,6,5,7,9]
isMonotonicIncreasing(a);
// output: false

a = [1,3,3,5,7,9]
isMonotonicIncreasing(a);
// output: true

a = [NULL,1,3,5,7,9]
isMonotonicIncreasing(a);
// output: true

a = [1,3,5,NULL,7,9]
isMonotonicIncreasing(a);
// output: false
```

Related functions: [isMonotonicDecreasing](isMonotonicDecreasing.md), [isMonotonic](isMonotonic.md)

