Prerequisite : Compute modulus division by a power-of-2-number
Now as you know for getting n modulus 2k, we just need to return k bits(from LSB) in binary representation of n. In Java, you can use Wrapper class toBinaryString() method to get binary string representation of a number and getting substring from (str.length()-k) to end. And then by using Integer.parseInt(), you can convert this binary substring to number which is the remainder. Below is the Java program to demonstrate the same.
15%2^(1) = 1 15%2^(2) = 3 15%2^(3) = 7
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