isNumber

Test if a value is a number.

Usage

var isNumber = require( '@stdlib/utils/is-number' );

isNumber( value )

Tests if a value is a number.

var bool = isNumber( 3.14 );
// returns true

bool = isNumber( new Number( 3.14 ) );
// returns true

bool = isNumber( NaN );
// returns true

bool = isNumber( null );
// returns false

isNumber.isPrimitive( value )

Tests if a value is a primitive number.

var bool = isNumber.isPrimitive( 3.14 );
// returns true

bool = isNumber.isPrimitive( NaN );
// returns true

bool = isNumber.isPrimitive( new Number( 3.14 ) );
// returns false

isNumber.isObject( value )

Tests if a value is a Number object.

var bool = isNumber.isObject( 3.14 );
// returns false

bool = isNumber.isObject( new Number( 3.14 ) );
// returns true

isNumber.isNumberArray( value )

Tests if a value is a number array.

var bool = isNumber.isNumberArray( [ 3.14, new Number(3.14) ] );
// returns true

bool = isNumber.isNumberArray( [ 3.14, '3.14' ] );
// returns false

isNumber.isPrimitiveNumberArray( value )

Tests if a value is a primitive number array.

var bool = isNumber.isPrimitiveNumberArray( [ 3.14, -1.0 ] );
// returns true

bool = isNumber.isPrimitiveNumberArray( [ 3.14, new Number(-1.0) ] );
// returns false

Examples

var isNumber = require( '@stdlib/utils/is-number' );

console.log( isNumber( 5 ) );
// returns true

console.log( isNumber( new Number( 5 ) ) );
// returns true

console.log( isNumber( NaN ) );
// returns true

console.log( isNumber( '5' ) );
// returns false

console.log( isNumber( null ) );
// returns false