25.73. FRAC

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The function returns the fractional part of the argument. This function always returns a double except that FRAC(undef) may return undef. FRAC(undef) is undef or raises an error if the option RaiseMatherror is set in bit sbMathErrUndef.

Negative arguments return negative value (or zero if the argument is a negative integer), positive arguments result positive values (or zero if the argument is integer).


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