Ensure a variable is divisible by 4

[Grant Edwards]

On 2006-12-04, geskerrett at hotmail.com <geskerrett at hotmail.com> wrote:

> I am sure this is a basic math issue, but is there a better
> way to ensure an int variable is divisible by 4

if x & 3:
  print "not divisible by 4"

x &= ~3

print "it is now: x = %d"

If you want to round to nearest power of 4 rather than truncate:

x = (x+2) & ~3

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