3 ms·
Clock arithmetic. Modulo 4: a clock with only four evenly-spaced marks on it. 17 is congruent to 1 (modulo 4) means: Starting at the top of the clock, go clo
by 0x7f800000 8y ago
Clock arithmetic.
Modulo 4: a clock with only four evenly-spaced marks on it.
17 is congruent to 1 (modulo 4) means:
Starting at the top of the clock, go clockwise one mark.
Starting at the top of the clock, go clockwise seventeen marks.
You'll end up at the same position.
That's congruence.