How to calculate the factorial of n in c language

The method of calculating n factorial in C language: first create a script file and write the header file; then define an "i" variable for looping and the variable "n"; then use "sum" to save it Result; finally run the script file to achieve n factorial.

The calculation of factorial in C language is actually the accumulation from 1 to n, so we can use a for loop to calculate the product sequentially from 1 to n Implementing the calculation of factorial

In the C language, we often encounter the problem of finding the factorial of a number. For those who have just learned the C language, finding the factorial is a must. Next, in the article, I will share with you how to implement factorial calculation through C language code. It has certain reference value and I hope it will be helpful to everyone.

[Recommended course: C Language Tutorial】

(1) Write the header file, which is the code that every C language program must write

#include<stdio.h>

(2) We can use a for loop to achieve this. First define an i variable for looping, and a variable n to find its factorial and sum to save the result. As shown below

int main()
{
    int n,i,s=1,sum=0;
    printf("请输入所求的阶乘数:");
    scanf("%d",&n);
for(i=1;i<=n;i++)
{
s=s*i;
sum=sum+s;
}
printf("%d!=%d\n",n,s);
printf("%d的阶乘和为：%d\n",n,sum);
    return 0;       
}

(3) Run the above code to realize the calculation of n factorial

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