mod, rem | Function |

**Syntax****mod**number divisor → modulus**rem**number divisor → remainder**Arguments and Values**`number`— a*real*.`divisor`— a*real*.`modulus`,`remainder`— a*real*.**Description****mod**and**rem**are generalizations of the modulus and remainder functions respectively.**mod**performs the operation**floor**on`number`and`divisor`and returns the remainder of the**floor**operation.**rem**performs the operation**truncate**on`number`and`divisor`and returns the remainder of the**truncate**operation.**mod**and**rem**are the modulus and remainder functions when`number`and`divisor`are*integers*.**Examples**(rem -1 5) → -1 (mod -1 5) → 4 (mod 13 4) → 1 (rem 13 4) → 1 (mod -13 4) → 3 (rem -13 4) → -1 (mod 13 -4) → -3 (rem 13 -4) → 1 (mod -13 -4) → -1 (rem -13 -4) → -1 (mod 13.4 1) → 0.4 (rem 13.4 1) → 0.4 (mod -13.4 1) → 0.6 (rem -13.4 1) → -0.4

**See Also****Notes**The result of

**mod**is either zero or a*real*with the same sign as`divisor`.