To truncate x to a whole number.
FIX does not round off numbers, it simply eliminates the decimal point and all characters to the right of the decimal point.
FIX(x) is equivalent to SGN(x)*INT(ABS(x)). The major difference between FIX and INT is that FIX does not return the next lower number for negative x.
FIX is useful in modulus arithmetic.
PRINT FIX(58.75) 58
PRINT FIX(-58.75) -58