C Exercises: Display the sum of first 10 natural numbers

Last update on March 18 2025 13:34:54 (UTC/GMT +8 hours)

2. Sum of First 10 Natural Numbers

Write a C program to compute the sum of the first 10 natural numbers.

This C program calculates the sum of the first 10 natural numbers. It utilizes a "for" loop to iterate through numbers 1 to 10, accumulating their sum, and then prints the total. This exercise is helpful for understanding basic loop constructs and arithmetic operations in C.

Visual Presentation:

Display the sum of first 10 natural numbers

Pseudo code to find the sum of the first 10 natural numbers:

Initialize a variable "sum" to 0
Initialize a loop variable "i" to 1
Repeat the following steps while i <= 10: a. Add i to the sum variable b. Increment i by 1
Print the "sum" variable value

Sample Solution:

C Code:

#include <stdio.h>  // Include the standard input/output header file.

int main() {  
    int j, sum = 0;  // Declare variables 'j' for the loop counter and 'sum' to store the sum.

    printf("The first 10 natural numbers are :\n");  // Print a message to indicate the output.

    for (j = 1; j <= 10; j++)  // Start a for loop to iterate from 1 to 10.
    {
        sum = sum + j;  // Add the current value of 'j' to the sum.
        printf("%d ", j);  // Print the current value of 'j'.
    }

    printf("\nThe Sum is : %d\n", sum);  // Print the sum of the first 10 natural numbers.
    return 0;  // Indicate successful execution of the program.
}

Output:

The first 10 natural number is :                                                                              
1 2 3 4 5 6 7 8 9 10                                                                                          
The Sum is : 55

Explanation:

for (j = 1; j <= 10; j++) {
  sum = sum + j;
  printf("%d ", j);
}

In the above for loop, the variable j is initialized to 1, and the loop will continue as long as j is less than or equal to 10. In each iteration of the loop, the sum variable will add the value of j to itself, and the printf function will print the value of j to the console, followed by a space character.

Finally, the loop will increment the value of j by 1, and the process will repeat until the condition j <= 10 is no longer true.

Flowchart:

For more Practice: Solve these Related Problems:

Write a C program to compute the sum of the first 10 natural numbers using recursion.
Write a C program to calculate the sum of the first 10 natural numbers using a closed-form formula without loops.
Write a C program to compute the sum of the first 10 natural numbers by splitting the sum into odd and even parts and combining them.
Write a C program to calculate the sum of the first 10 natural numbers using only bitwise operators for addition.

C Programming Code Editor:

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