Reverse Integer

This Is one of Very Basic Programming Problem  for beginner . But If you never Did it , Try it once.

Reverse Given Number :- 

Example >> Let Number is 12345 then after reversing Number Should be 54321

There is two way to do it

Way 1:-

Pop Last Digit then push it to another variable and repeat procedure until       number == 0

• temp = num%10
• num = num/10
• numr = numr*10 + temp
• repeat above step until num==0

C++ Program to Reverse integer :

1. // Reverse a Number
2. //Ex:- 12345 -> 54321
3. #include<iostream>
4. using namespace std;
6. main(){
7.         long int num,numr=0;
8.         int temp;
9.         cout<<"Enter Number : ";
10.         cin>>num;
11.         // Reverse Number :- just pop last digit and push it to numr,
12.         //repeate above step untill num=0
13.         while(num>0){
14.                 temp=num%10;
15.                 num =num/10;
16.                 numr=(numr*10)+temp;
17.         }
18.         cout<<"Revrsed number :"<<numr;
19.         return 0;
20. }

Way 2 :-

Convert number In string then reverse it than change it to integer . In some programming language it is very easy .

Python :- Reverse Integer :-

1. # Reverse an interger
2. if __name__=='__main__':
3.     num=int(raw_input('Enter Number: '))
4.     numr=str(num)[::-1] #reverse String
5.     numr=int(numr)
6.     print 'reverse integer :',numr

OutPut :-

Reverse Integer