
Java Math Exercises: Reverse an integer number
Java Math Exercises: Exercise-6 with Solution
Write a Java program to reverse an integer number.
Sample Solution:-
Java Code:
public class Example6 {
public static void main(String[] args) {
int num =1287;
int is_positive = 1;
if (num < 0) {
is_positive = -1;
num = -1 * num;
}
int sum = 0;
while (num > 0) {
int r = num % 10;
int maxDiff = Integer.MAX_VALUE - sum * 10;
if (sum > Integer.MAX_VALUE / 10 || r > maxDiff)
System.out.println("Wrong number");;
sum = sum * 10 + r;
num /= 10;
}
System.out.println(is_positive * sum);
}
}
Sample Output:
7821
Java Code Editor:
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