Question

How to reverse an int in Java

Answer 1

public class MyClass {
    public static void main(String args[]) {
        int n = 1234, rev = 0;
         
        while (n != 0) {
            int last_digit = n % 10;
            rev = rev * 10 + last_digit;
            n /= 10;
        }
         
        System.out.println(rev);
    }
}



/*
run:

4321

*/

 

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