Pleaseenter a non-negative number: 3 3! = 3 X 2X 1 = 6 Pleaseenter a non-negative number: 10 10! = 10 X9 X 8 X 7 X 6 X 5 X 4 X 3 X 2 X 1 = 3628800 Pleaseenter a non-negative number: -1 Invalid input one iswrite using for loop and other is write using while loop p/s:output like above

Can you post your code? Your English is so bad that it is hard to understand what you want. It sounds like you are looking for Absolute Values. If that is the case please specify.

Homework?

Wahine: Homework? Sounds like it, but he didn't even bother to copy/paste it correctly.

i want to know how to write those code One is using for loop only, write a shell script to calculate factorial like example And other one is using while loop only, write a shell script to calculate factorial like example

#include <stdio.h> #include <stdlib.h> int main(void){ int factorial; printf("Please enter a nonnegative integer: "); scanf("%d",&factorial); int i; int answer=1; for(i = factorial; i > 0; i--) { answer *= i; } printf("%d! is %d\n",factorial,answer); system("PAUSE"); return 0; } plz help me change to shell script code

Since you did it in "C", I'll do it in bash shell: #!/bin/bash printf "Please enter a nonnegative integer: " read factorial i=$factorial answer=1 while [[ $i -ne 0 ]] do ((answer*=i)) ((i -= 1)) done printf "%d! is %d\n", $factorial $answer