isNegativeZero

Test if a double-precision floating-point numeric value is negative zero.

Usage

var isNegativeZero = require( '@stdlib/math/base/assert/is-negative-zero' );

isNegativeZero( x )

Tests if a double-precision floating-point numeric value is negative zero.

var bool = isNegativeZero( -0.0 );
// returns true

bool = isNegativeZero( 0.0 );
// returns false

Examples

var isNegativeZero = require( '@stdlib/math/base/assert/is-negative-zero' );

var bool = isNegativeZero( -0.0 );
// returns true

bool = isNegativeZero( 0.0 );
// returns false

bool = isNegativeZero( 5.0 );
// returns false

bool = isNegativeZero( -1.0 );
// returns false

bool = isNegativeZero( NaN );
// returns false

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See Also

• @stdlib/math/base/assert/is-positive-zero: test if a double-precision floating-point numeric value is positive zero.