On Aug 19, Bryan Harris said:
Is there a simple formula to round some value X up to the next multiple of
some other value T?
Generally speaking, you can do:
$x + (-$x % $t)
For 10 to round up to the next multiple of 3, it's 10 + (-10 % 3) which is
10 + 2 = 12. Likewise, for negative numbers: -14 to round up to the next
multiple of 5 is -14 + (14 % 5) which is -14 + 4 = -10.
To round down, it's simply:
$x - ($x % $t)
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