---
name: rand
status: documented
runtime: pp
source: src/runtime/pp/helpers.rs
---
```{index} single: rand; Perl built-in (pp runtime)
```

# rand

## Synopsis

```perl
my $r = rand;          # 0 <= $r < 1
my $r = rand(10);      # 0 <= $r < 10
my $r = rand($n);
```

## Description

Returns a pseudo-random floating-point number.

Returns a pseudo-random floating-point number greater than or equal to
0 and less than EXPR (or 1 if omitted). If EXPR evaluates to zero,
1.0 is used instead. Uses the interpreter's `StdRng` state, which
can be seeded via `srand`. Not suitable for cryptographic purposes.

## See also

srand, int