Program to find the Fibonacci Series

In this example, We will learn a program to find the Fibonacci Series. Before that, You must have knowledge of the following topics

• Introduction
• For Loop

Algorithm

This is the algorithm of program to find fibonacci Series

Step 1: Start
Step 2: Initialize variables i, n, t1 = 0, t2 = 1
Step 3: Initialize variable and assign t1 + t2
Step 4: Take input from the user and assign to variable n
Step 5: Assign i = 1
Step 6: Repeat this step until i <= n
           Step 6.1: Print nextTerm variable
          Step 6.2: t1 = t2
         Step 6.3: t2 = nextTerm
         Step 6.4: nextTerm = t1 + t2
Step 7: End

Flowchart

This is the flowchart of program to find fibonacci Series

CODE: Program to find the fibonacci Series

We will print fibonacci Series using for loop.

#include <stdio.h>

int main() {

    int i, n, t1 = 0, t2 = 1;
    int nextTerm = t1 + t2;
    
    printf("Enter the number of terms: ");
    scanf("%d", &n);
    printf("Fibonacci Series: %d\t%d\t", t1, t2);

    for (i = 1; i <= n-2; ++i) {
        printf("%d\t", nextTerm);
        t1 = t2;
        t2 = nextTerm;
        nextTerm = t1 + t2;
    }

    return 0;
}

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The output of above program is

Enter number of terms : 10
0       1       1       2       3       5       8       13      21      34