- C program to print a long variable using putchar function only, without using any standard library functions except putchar function.

**Algorithm to print a long variable using putchar function only.**

- Check if input number(N) is negative number. if N us negative them print '-' character.
- If N is zero, then print '0' character.
- Remove last digit of N using % operator (N%10) an pass the remaining numbers to recursive call. Repeat these steps, until N >= 0;

## C program to print a long variable using putchar function only.

#include <stdio.h> void my_putchar(long var) { /* print '-' for negative numbers */ if (var < 0) { putchar('-'); var = var * -1; } /* Print Zero */ if (var == 0) putchar('0'); /* First remove the last digit of number and print the remaining digits using recursion, then print the last digit */ if (var/10) my_putchar(var/10); putchar(var%10 + '0'); } // Driver program to test abvoe function int main() { long var; printf("Enter a long integer\n"); scanf("%ld", &var); my_putchar(var); return 0; }Output

Enter a long integer 125368 125368