---
name: "slasrt"
section: "3"
platform: "linux"
package: "lapack-doc"
version: "3.12.1-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/slasrt.f"
---

# slasrt(3)

Part of [slasrt.f(3)](/slasrt.f/3.md).

## NAME

SRC/slasrt.f

## SYNOPSIS

### Functions/Subroutines

subroutine **slasrt** (id, n, d, info)\
 **SLASRT** sorts numbers in increasing or decreasing order.

## Function/Subroutine Documentation

### subroutine slasrt (character id, integer n, real, dimension( \* ) d, integer info)

**SLASRT** sorts numbers in increasing or decreasing order.

**Purpose:**

```
!>
!> Sort the numbers in D in increasing order (if ID = 'I') or
!> in decreasing order (if ID = 'D' ).
!>
!> Use Quick Sort, reverting to Insertion sort on arrays of
!> size <= 20. Dimension of STACK limits N to about 2**32.
!>
```

**Parameters**

*ID*

```
!>          ID is CHARACTER*1
!>          = 'I': sort D in increasing order;
!>          = 'D': sort D in decreasing order.
!>
```

*N*

```
!>          N is INTEGER
!>          The length of the array D.
!>
```

*D*

```
!>          D is REAL array, dimension (N)
!>          On entry, the array to be sorted.
!>          On exit, D has been sorted into increasing order
!>          (D(1) <= ... <= D(N) ) or into decreasing order
!>          (D(1) >= ... >= D(N) ), depending on ID.
!>
```

*INFO*

```
!>          INFO is INTEGER
!>          = 0:  successful exit
!>          < 0:  if INFO = -i, the i-th argument had an illegal value
!>
```

**Author**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **87** of file **slasrt.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.