Return the sign of the numeric arg $n as an integer -1, 0, 1.

Note: Not defined when $n is Infinity or NaN (or NULL or ...)!

Parameters

int|float $n: The number to test.

Return value

int -1 if the $n is negative, 0 if $n is zero or 1 if $n is positive.

See also

gmp_sign()

1 call to CtoolsMathExpressionTestCase::sign()

CtoolsMathExpressionTestCase::assertFloat in tests/math_expression.test

A custom assertion with checks the values in a certain range.

File

tests/math_expression.test, line 42

Class

CtoolsMathExpressionTestCase

Tests the MathExpression library of ctools.

Code

protected static function sign($n) {
    return ($n > 0) - ($n < 0);
}