Problem
How to print the given in reverse order with the help of iterative function i.e., while loop using C programming language?
Solution
So far, we had seen how to reverse the string using string function and without string function, now let’s see how to reverse a number without using predefined function −
Algorithm
Input − give a number at runtime
Step 1: Declare the variable number,reverse Step 2: Initialize reverse= 0 Step 3: while number>0 (a) reverse=reverse*10 + number%10; reverse = reverse*10 + num%10; (b) Divide number by 10 Step 4: return reverse
Example
#include <stdio.h>
int reverse(int number){
int reverse = 0;
while(number > 0){
reverse = reverse*10 + number%10;
number = number/10;
}
return reverse;
}
int main(){
int number;
printf("enter a number:");
scanf("%d",&number);
printf("Reverse of no. is %d", reverse(number));
getchar();
return 0;
}Output
enter a number:356789 Reverse of no. is 987653