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//program to create a function to find factorial of number passed to function as argument #include<stdio.h> #include<conio.h> void factorial(int); //function declaration void factorial(int a) //function definition { int fact=1; int i; for(i=1;i<=a;i++) { fact=fact*i; } printf("factorial of number is %d",fact); } void main() { int a; clrscr(); printf("enter number to find factorial for "); scanf("%d",&a); factorial(a); //calling the function getch(); }