C Exercises: Display sum of series 1 + 1/2 + 1/3 + ………. + 1/n

Last update on September 18 2025 12:35:40 (UTC/GMT +8 hours)

Calculate the sum of the series 1+1/2+1/3+...+1/n

Write a C program to display the sum of series 1 + 1/2 + 1/3 + ………. + 1/n.

Sample Solution:

C Code:

#include<stdio.h>
int main() {
    int num, i, sum = 0;

    // Prompt the user to input a number
    printf("Input any number: ");
    scanf("%d", &num);

    // Display the initial part of the series
    printf("1 + ");

    // Print the series
    for(i = 2; i <= num - 1; i++)
        printf(" 1/%d +", i);

    // Calculate the sum of the series
    for(i = 1; i <= num; i++)
        sum = sum + i;

    // Display the last term of the series
    printf(" 1/%d", num);

    // Calculate and display the sum
    printf("\nSum = 1/%d", sum + 1/num);

    return 0;
}

Sample Output:

Input any number: 1 +  1/0
Sum = 1/0

Flowchart:

C Programming Flowchart: Display sum of series 1 + 1/2 + 1/3 + ………. + 1/n

For more Practice: Solve these Related Problems:

Write a C program to compute the harmonic series sum up to n terms with careful precision handling.
Write a C program to calculate the harmonic series using recursion.
Write a C program to compute the sum of the series while skipping terms where the denominator is prime.
Write a C program to calculate the series sum and then compute the average of its terms.

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