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C Exercises: Find the sum of specified series

C Function : Exercise-5 with Solution

Write a program in C to find the sum of the series 1!/1+2!/2+3!/3+4!/4+5!/5 using the function.

Pictorial Presentation:

C Exercises: Find the sum of specified series

Sample Solution:

C Code:

#include <stdio.h>

int fact(int);
void main()
{
    int sum;
    sum=fact(1)/1+fact(2)/2+fact(3)/3+fact(4)/4+fact(5)/5;
	printf("\n\n Function : find the sum of 1!/1+2!/2+3!/3+4!/4+5!/5 :\n");
	printf("----------------------------------------------------------\n");    
    printf("The sum of the series is : %d\n\n",sum);
}

int fact(int n)
    {
        int num=0,f=1;
        while(num<=n-1)
        {
            f =f+f*num;
            num++;
        }
    return f;
    }
	

Sample Output:

 Function : find the sum of 1!/1+2!/2+3!/3+4!/4+5!/5 :
----------------------------------------------------------
The sum of the series is : 34

Flowchart:

Flowchart: Find the sum of specified series

C Programming Code Editor:

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C Programming: Tips of the Day

Static variable inside of a function in C

The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().

The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.

The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().

Ref : https://bit.ly/3fOq7XP