Definition of floyd's triangle:
Floyd's triangle is a right angled-triangle using the natural numbers. Examples of floyd's triangle:Example 1:
1
2 3
4 5 6
7 8 9 10Example 2:
1
2   3
4   5   6
7   8   9   10
11  12  13  14  15
16  17  18  19  20 21

LCM of two integers is a smallest positive integer which is multiple of both integers that it is divisible by the both of the numbers.
For example: LCM of two integers 2 and 5 is 10 since 10 is the smallest positive numbers which is divisible by both 2 and 5.

HFC is also called greatest common divisor (gcd). HCF of two numbers is a largest positive numbers which can divide both numbers without any remainder.  For example HCF of two numbers 4 and 8 is 2 since 2 is the largest positive number which can dived 4 as well as 8 without a remainder.

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

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

    temp=num;
    while(num){
         r=num%10;
         num=num/10;
         sum=sum*10+r;
    }
    if(temp==sum)
         printf("%d is a palindrome",temp);
    else
         printf("%d is not a palindrome",temp);

    return 0;
}
Sample output:
Enter a number: 131
131 is a palindrome

#include<stdio.h>
int main(){
    int num,r,sum,temp;
    int min,max;

    printf("Enter the minimum range: ");
    scanf("%d",&min);

    printf("Enter the maximum range: ");
    scanf("%d",&max);

    printf("Palindrome numbers in given range are: ");
    for(num=min;num<=max;num++){
         temp=num;
         sum=0;

         while(temp){
             r=temp%10;
             temp=temp/10;
             sum=sum*10+r;
         }
         if(num==sum)
             printf("%d ",num);
    }
    return 0;
}
Sample output:
Enter the minimum range: 1
Enter the maximum range: 50
Palindrome numbers in given range are: 1 2 3 4 5 6 7 8 9 11 22 33 44