isLowercase

Test if a value is a lowercase string.

Usage

var isLowercase = require( '@stdlib/assert/is-lowercase' );

isLowercase( value )

Tests if a value is a lowercase string.

var bool = isLowercase( 'salt and light' );
// returns true

bool = isLowercase( 'HELLO' );
// returns false

bool = isLowercase( 'World' );
// returns false

Notes

  • This function validates that a value is a string. For all other types, the function returns false.

Examples

var isLowercase = require( '@stdlib/assert/is-lowercase' );

var bool = isLowercase( 'hello' );
// returns true

bool = isLowercase( '' );
// returns false

bool = isLowercase( 'Hello' );
// returns false

bool = isLowercase( 'HELLO' );
// returns false

CLI

Usage

Usage: is-lowercase [options] [<string>]

Options:

  -h,    --help                Print this message.
  -V,    --version             Print the package version.

Examples

$ is-lowercase BEEP
false

To use as a standard stream,

$ echo -n 'boop' | is-lowercase
true