# C program to find out the palindrome number in a range :

In this C programming tutorial, we will learn how to find out all palindrome numbers in a range. Palindrome numbers are numbers that look same if reversed. For example, *141* is a palindrome number but *122* is not.

Our program will take the start number and the end number as input and it will find out all palindrome numbers between these numbers including them.

To find out a palindrome, we will reverse the number and compare it with the original number. If both numbers are equal, means the number is a palindrome.

## C program :

Let’s take a look at the program :

#include <stdio.h> int main() { //1 int startNumber; int endNumber; int i; int currentNumber; int reversedNumber; int rem; //2 printf("Enter the first number : "); scanf("%d", &startNumber); //3 printf("Enter the second number : "); scanf("%d", &endNumber); //4 printf("Palindrome number between %d and %d are : \n", startNumber, endNumber); for (i = startNumber; i <= endNumber; i++) { currentNumber = i; reversedNumber = 0; //5 while (currentNumber) { rem = currentNumber % 10; currentNumber = currentNumber / 10; reversedNumber = reversedNumber * 10 + rem; } if(i == reversedNumber){ printf("%d ", i); } } return 0; }

### Explanation :

*The commented numbers in the above program denote the step numbers below :*

1. First, create a few integer variables to use in the program.

2. Ask the user to enter the first number. Read and store it in the *startNumber*.

3. Similarly, ask the user to enter the second number. Read and store it in the *endNumber* variable.

4. Print out the palindrome numbers in this range. Use one *for loop* to scan the numbers one by one starting from *startNumber* up to *endNumber*.

5. Inside the loop, we are using one *while loop* to find out the reverse of the current number. If the reversed number is equal to the current number, print it. Else, move to the next number.

### Sample Output :

Enter the first number : 10 Enter the second number : 100 Palindrome number between 10 and 100 are : 11 22 33 44 55 66 77 88 99 Enter the first number : 1000 Enter the second number : 2000 Palindrome number between 1000 and 2000 are : 1001 1111 1221 1331 1441 1551 1661 1771 1881 1991

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