Program to print the Fibonacci Series using Function

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

• Introduction
• For Loop
• Function

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: Fibonacci Series using Function

We will print fibonacci Series

#include<stdio.h>

//Function Prototype
void fibonacci(int num);

void main(){

    int num = 0;

    printf("Enter number of terms : ");
    scanf("%d", &num);

    //Function to print Fibonacci Series
    fibonacci(num);
    
}

//Function to print Fibonacci Series
void fibonacci(int num){

    int a, b, c, i = 3;
    a = 0;
    b = 1;

    if(num == 1)
        printf("%d",a);

    if(num >= 2)
        printf("%d\t%d",a,b);

    while(i <= num){

        c = a+b;
        printf("\t%d", c);
        a = b;
        b = c;
        i++;
    }
}

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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