| mod | modulo operator |
| Syntax | mod
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| Description | The mod (modulo) operator produces the modulo of one number with another. In other words, the result is always a number between 0 and the second operand. If both operands are positive, the result is identical to the remainder operator. For example, 7 mod 2 produces 1 and 12 mod 5 produces 3.
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| Example | In this example, hours is the current time. It is moved back and forth by a random amount, but the final result must always be between 1 and 12 (the mod operation produces a number between 0 and 11 and then 0 becomes 12).
var hours : int := 12
var hoursPassed : int
put "The time is now ", hours, " o'clock"
loop
randint (hoursPassed, -12, 12)
exit when hoursPassed = 0
if hoursPassed < 0 then
put hoursPassed, " hours before " ..
else
put hoursPassed, " hours later " ..
end if
put hours, " o'clock" ..
hours := (hours + hoursPassed) mod 12
if hours = 0 then
hours = 12
end if
put " it was ", hours, " o'clock"
end loop
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| Details | If the second operand is positive, then the result is always non-negative. Likewise, if the second operand is negative, then the result is always non-positive. If both operands are negative, the result is the same as the remainder operator.
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| See also | infix operators, precedence of operators and the rem and div operators.
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