Calculate the modulo (remainder) of dividing one number by another. The modulo operation finds the remainder after division and is widely used in programming, cryptography, and number theory.
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The modulo operation computes the remainder when a is divided by n. It is calculated as a - n × floor(a/n). For example, 17 mod 5 = 2 because 17 = 5 × 3 + 2.
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