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The Maxima on-line user's manual

Algebra Calculator

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Signum

Function: signum (<x>) For numeric <x>, returns 0 if <x> is 0, otherwise returns -1 or +1 as <x> is less than or greater than 0, respectively.

a: -2;
abs(a);
signum(a);

If <x> is not numeric then a simplified but equivalent form is returned. For example, signum(-x) gives -signum(x).

(%o1)                                true
(%i2) 

Related Examples

signum

q(x):=(signum(x)+1)*0.5;

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signum

a:signum(-12);

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signum

signum(-4);

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signum

signum(6+(3));

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signum

signum(3.2);

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signum

signum(-1);

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signum

signum(-3.2);

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signum

signum(0.048);

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signum

signum(1/4);

Calculate

signum

signum(a*b+ a * (1-b));

Calculate