C program to find reverse of a number

#include <stdio.h>
int main(){
    int num,r,reverse=0;

    printf("Enter any number: ");
    scanf("%d",&num);

    while(num){
         r=num%10;
         reverse=reverse*10+r;
         num=num/10;
    }

    printf("Reversed of number: %d",reverse);
    return 0;
}

C program for Reverse very large or big numbers beyond the range of long int

#include < stdio.h >
#define MAX 1000

int main(){

char num[MAX];
int i=0,j,flag=0;

printf("Enter any positive integer: ");
scanf("%s",num);

while(num[i]){
 if(num[i] < 48 || num[i] > 57){
	 printf("Invalid integer number");
	 return 0;
 }
 i++;
}

printf("Reverse: ");
for(j=i-1;j>=0;j--)
 if(flag==0 &&  num[j] ==48){
 }
 else{
	 printf("%c",num[j]);
	 flag =1;
 }

return 0;

C program to reverse a number using for loop

#include <stdio.h>
int main(){
    int num,r,reverse=0;

    printf("Enter any number: ");
    scanf("%d",&num);

    for(;num!=0;num=num/10){
         r=num%10;
         reverse=reverse*10+r;
    }

    printf("Reversed of number: %d",reverse);
    return 0;
}

C program to reverse a number using recursion

#include <stdio.h>
int main(){
    int num,reverse;

    printf("Enter any number: ");
    scanf("%d",&num);

    reverse=rev(num);
    printf("Reverse of number: %d",reverse);
    return 0;
}

int rev(int num){
    static sum,r;

    if(num){
         r=num%10;
         sum=sum*10+r;
         rev(num/10);
    }
    else
         return 0;

    return sum;
}