function Trunc (x: Real): Integer;
Trunc returns the integer part of a floating point number as an integer. Use Int to get the integer part as a floating point number.
Trunc is defined in ISO 7185 Pascal and supported by all known Pascal variants.
program TruncDemo; begin WriteLn (Frac (12.345) : 1 : 5); { 0.34500 } WriteLn (Int (12.345) : 1 : 5); { 12.00000 } WriteLn (Round (12.345) : 1); { 12 } WriteLn (Trunc (12.345) : 1); { 12 } WriteLn (Frac (-12.345) : 1 : 5); { -0.34500 } WriteLn (Int (-12.345) : 1 : 5); { -12.00000 } WriteLn (Round (-12.345) : 1); { -12 } WriteLn (Trunc (-12.345) : 1); { -12 } WriteLn (Frac (12.543) : 1 : 5); { 0.54300 } WriteLn (Int (12.543) : 1 : 5); { 12.00000 } WriteLn (Round (12.543) : 1); { 13 } WriteLn (Trunc (12.543) : 1); { 12 } WriteLn (Frac (-12.543) : 1 : 5); { -0.54300 } WriteLn (Int (-12.543) : 1 : 5); { -12.00000 } WriteLn (Round (-12.543) : 1); { -13 } WriteLn (Trunc (-12.543) : 1); { -12 } end.
Real Types, Real, Int, Frac, Round.