Palindrome number using C program

 

C program to find Palindrome Number

Palindrome Number:

Palindrome number is the number which is same after reverse.

Example:

121,23432,545 are palindrome numbers.

123,546,7634 are not palindrome numbers.

C Program:

#include <stdio.h> #include <string.h> int main() { int num; scanf("%d",&num); int n=num; int sum=0,r=0; while(n>0) { r=n%10; sum=(sum*10)+r; n=n/10; } if(sum==num) { printf("palindrome number"); } else { printf("not an palindrome number"); } return 0; }

Output 1:

Output 2:

From the above program,

ü   let num=5335

 ü n=num, n=5335

n>0	r=n%10	sum=(sum*10)+r	n=n/10
5335>0	r=5335%10   =5	sum=(0*10)+5        =5	n=5335/10    533
533>0	r=533%10   =3	sum=(5*10)+3        =50+3        =53	n=533/10   =53
53>0	r=53%10   =3	Sum=(53*10)+3        =533	n=53/10   =5
5>0	r=5%10   =5	sum=(533*10)+5       =5335	n=5/10 =0
0>0 false	Doesn’t execute

  ü after the execution of above table, sum= 5335.

if(sum==num) { printf("palindrome number"); } else { printf("not an palindrome number"); }

 ü  now it checks the condition sum==num(5335==5335), since the condition is true, it is palindrome number.