C Exercises: Display the first n terms of Fibonacci series

C For Loop: Exercise-35 with Solution

Write a program in C to display the first n terms of the Fibonacci series.
The series is as follows:
Fibonacci series 0 1 2 3 5 8 13 .....

Visual Presentation:

Sample Solution:

C Code:

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

int main() {
    int prv = 0, pre = 1, trm, i, n; // Declare variables for previous, current, and next terms, as well as loop counters.

    // Prompt the user to input the number of terms.
    printf("Input number of terms to display: ");
    scanf("%d", &n); // Read the input from the user.

    // Print a message indicating the number of terms.
    printf("Here is the Fibonacci series up to %d terms:\n", n);

    printf("%5d %5d", prv, pre); // Print the first two terms.

    for (i = 3; i <= n; i++) { // Loop to generate the Fibonacci series starting from the third term.
        trm = prv + pre; // Calculate the next term.
        printf("%5d", trm); // Print the next term.
        prv = pre; // Update the previous term.
        pre = trm; // Update the current term.
    }

    printf("\n"); // Move to the next line after printing the series.

    return 0; // Return 0 to indicate successful execution.
}

Sample Output:

Input number of terms to  display : 10                                                                        
Here is the Fibonacci series upto  to 10 terms :                                                              
    0     1    1    2    3    5    8   13   21   34  

Flowchart:

C Programming Code Editor:

Previous: Write a program in C to find the prime numbers within a range of numbers.
Next: Write a program in C to display the such a pattern for n number of rows using a number which will start with the number 1 and the first and a last number of each row will be 1.