Program to print First and last digit of a number using while loop in C-language

-
#include<stdio.h>
int main()
{
int n,a,f;
printf("Enter any number\n");
scanf("%d",&n);
    f=n%10;
while(n!=0)
{
a=n%10;
n=n/10;
}
printf("First digit=%d\nLast digit=%d",a,f);
}

OUTPUT
Enter any number
5687
First digit=5
Last digit=7

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