Write a C++ Program to reverse a number.
Example:
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Input: 456 Output: 654 Input: 132 Output: 231 |
To reverse a number, we need to extract and append the last digit from the original number to its reverse rev = rev*10 + num%10.
We have to remove the last digit once it has been appended to the reverse string num = num/10.
So let’s write the C++ program.
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#include <iostream> using namespace std; int main() { int num; //Input a number cout << "Enter a Number: "; cin >> num; //Initialize rev with 0 int rev=0; //Append digits of num from last to first while(num>0){ rev = rev*10 + num%10; num = num/10; } cout << "Reverse: " << rev; return 0; } |
Output
Enter a Number: 243
Reverse: 342
If you have any doubts or suggestion then comment below.