Algorithm
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Declaration of Variables:
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originalNumber: The input number to be reversed.
reversedNumber: The variable to store the reversed number.
remainder: Temporary variable to store the last digit of originalNumber in each iteration.
Input:
The user is prompted to enter an integer, which is stored in originalNumber.
Reverse the Number: -
The while loop runs until originalNumber becomes zero.
In each iteration:
remainder is calculated as the last digit of originalNumber (using the modulo % operator).
reversedNumber is updated by multiplying it by 10 and adding the current remainder.
The last digit is removed from originalNumber by dividing it by 10.
Output:
The reversed number (reversedNumber) is displayed to the user.
Code Examples
#1 Code Example-Programing to Reverse a Number Using While Loop
Code -
C Programming
#include <stdio.h>
int main(){
int Num, rev_Num = 0, remainder;
printf("Enter the number to reverse: ");
scanf("%d", &Num);
while (Num != 0){
remainder = Num % 10;
rev_Num = rev_Num * 10 + remainder;
Num = Num/10;
}
printf("The reversed number is: %d", rev_Num);
return 0;
}Output
The Reversed number is : 74531
#2 Code Example-Programing to Reverse a Number Using Recursion
Code -
C Programming
#include<stdio.h>
int main(){
int Num,rev_Num;
printf("Enter the number to reverse: ");
scanf("%d",&Num);
//Calling our function that will repeat itself
rev_Num=rev_Func(Num);
printf("\nThe reversed number is :%d",rev_Num);
return 0;
}
int sum=0,remainder;
rev_Func(int Num){
if(Num){
remainder=Num%10;
sum=sum*10+remainder;
rev_Func(Num/10);
}
else
return sum;
return sum;
}Output
The Reversed number is : 35645
#3 Code Example-Programing to Reverse a Number Using For Loop
Code -
C Programming
#include<stdio.h>
void main(){
int Num,rev_Num=0,remainder,a;
printf("Enter the number to reverse: ");
scanf("%d",&Num);
a=Num;
for(;Num>0;){
remainder=Num%10;
rev_Num=rev_Num*10+remainder;
Num=Num/10;
}
printf("Reverse of %d is %d",a,rev_Num);
}Output
The Reversed number is : 456
#4 Code Example-Program to Reverse a Number Using Function
Code -
C Programming
#include <stdio.h>
int rev_Int(int);
int main(){
int Num, Rev = 0;
printf("\nEnter the number to reverse: ");
scanf("%d", &Num);
Rev = rev_Int (Num);
printf("Reverse of %d is = %d\n", Num, Rev);
return 0;
}
int rev_Int (int Num){
int remainder, Rev = 0;
while (Num > 0){
remainder = Num %10;
Rev = Rev *10+ remainder;
Num = Num /10;
}
return Rev;
}Output
The Reversed number is : 81456
Demonstration
C Programing Example to Reverse A Number Using Different Methods-DevsEnv