PMLAB presentation function and paramenter

lab functions

1. Program:Factorial using function & parameter #include < stdio.h > #include< conio.h > //function declaration int factorial ( int n); i nt main() { i nt num,result ; //input from user

2. printf (“Enter a number:”); scanf (“% d”, & num ); //Check for negative input if(num<0) { printf (“Factorial is not defined for negative numbers.\n”); } else { result = factorial(num); //Function call

3. printf (“Factorial of %d is %d\ n”,num,result ); } getch (); return 0; } // Fanction to calculate factorial int factorial( int n) { int fact = 1; for( int i = 1; i <= n; i ++) { fact*= i ; }

4. return fact; } Output: (1) Enter a number : 8 Factorial of 8 is 40320 (2) Enter a number : -5 Factorial is not defind for negative numbers. (3) Enter a number : 0 Factorial of 0 is 1