GAP Manual: 10.6. Int

Int( obj )

Int converts an object obj to an integer. If obj is an integer Int will simply return obj.

If obj is a rational number (see Rationals) Int returns the unique integer that has the same sign as obj and the largest absolute value not larger than the absolute value of obj.

If obj is an element of the prime field of a finite field F, Int returns the least positive integer n such that n* F.one = obj (see IntFFE).

If obj is not of one of the above types an error is signalled.

    gap> Int( 17 );
    17
    gap> Int( 17 / 3 );
    5
    gap> Int( Z(5^3)^62 );
    4  # $Z(5^3)^{62}=(Z(5^3)^{124/4})^2=Z(5)^2=PrimitiveRoot(5)^2=2^2$