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Factorial of a Number
This program calculates the the factorial of an integer number entered by the user. The function uses for loop to calculate the factorial and returns the number. Program terminates if a non integer number is entered. This C language program uses for loop in just a single statement to calculates the factorial of integer number.
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* MYCPLUS Sample Code - http://www.mycplus.com *
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* purpose of illustration. *
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#include <stdio.h>
int fact(int n);
int main(void) {
int current;
printf("Enter a positive integer [to terminate enter non-positive] > ");
scanf("%d", &t);
while (current > 0) {
printf("The factorial of %d is %d\n", current, fact(current));
printf("Enter a positive integer [to terminate enter non-positive] > ");
scanf("%d", &t);
}
}
/* n is a positive integer. The function returns its factorial */
int fact(int n) {
int lcv; /* loop control variable */
int p; /* set to the product of the first lcv positive integers */
for(p=1, lcv=2; lcv <= n; p=p*lcv, lcv++);
return p;
}
Tags: C Programming, Source Code
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please see the program ….
#include <stdio.h> void main() { int a,fact,b; //fact 5! = 5*4*3*2*1 label: printf(" \n...... ..Factorial..............\n"); printf("Enter a number between 1 and 100\n\r"); scanf("%d",&a); b = a; if(a>100|| a = 1) { fact = fact * a; a = a-1; } printf("The factorial of %d is %d",b ,fact); printf("\n\rEnter an invalid number to exit"); goto label; return 0; }Yes, but on 13! standart C int is oferflowed. ;-)
#include
#include
void main()
{
int f=1,i,num;
clrscr();
printf(“Enter the value”);
scanf(“%d”,num);
for(i=1;i<=n;i++)
f=f*i;
printf("factorial of %d is %d",f);
getch();
}