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Write a Java Program to Reverse a Number
PROGRAM: Java Program to Reverse a Number
/* Java Program to Reverse a Number */
1: Reverse a Number using a while loop in Java
class Main {
public static void main(String[] args) {
int num = 1234, reversed = 0;
System.out.println(“Original Number: ” + num);
// run loop until num becomes 0
while(num != 0) {
// get last digit from num
int digit = num % 10;
reversed = reversed * 10 + digit;
// remove the last digit from num
num /= 10;
}
System.out.println(“Reversed Number: ” + reversed);
}
}
2: Reverse a number using a for loop in Java
class Main {
public static void main(String[] args) {
int num = 1234567, reversed = 0;
for(;num != 0; num /= 10) {
int digit = num % 10;
reversed = reversed * 10 + digit;
}
System.out.println(“Reversed Number: ” + reversed);
}
}
