- C Programming Examples
- C Programming Examples
- C Print Hello World
- C Get Input from User
- C Print Integer
- C Add Two Numbers
- C Add Subtract Multiply Divide
- C Add n Numbers
- C Area Perimeter of Square
- C Area Perimeter of Rectangle
- C Area Circum of Circle
- C Fahrenheit to Celsius
- C Celsius to Fahrenheit
- C Inches to Centimeters
- C Kilogram to Gram
- C Reverse a Number
- C Swap Two Numbers
- C Interchange Numbers
- C Print ASCII Value
- C Print Fibonacci Series
- C Check Palindrome or Not
- C Check Armstrong or Not
- C Find Armstrong Numbers
- C Find nCr and nPr
- C Find Profit Loss
- C Sum of their Square
- C First & Last Digit Sum
- C Sum of All Digit
- C Product of All Digit
- C Print Total Digit in Number
- C Check Perfect Number
- C Find Basic Gross Salary
- C Round Number to Integer
- C Print Series upto n Term
- C Find Factors of Number
- C if-else & Loop Programs
- C Check Even or Odd
- C Check Prime or Not
- C Check Alphabet or Not
- C Check Vowel or Not
- C Check Leap Year or Not
- C Is Reverse Equal Original
- C Make Calculator
- C Add Digits of Number
- Count Positive Negative Zero
- C Largest of Two Numbers
- C Largest of Three Numbers
- C Smallest of Two Numbers
- C Smallest of Three Numbers
- C Find Factorial of Number
- C Find LCM & HCF
- C Find LCM of n Numbers
- C Find HCF of n Numbers
- C Find Arithmetic Mean
- C Find Average, Percentage
- C Find Student Grade
- C Print Table of Number
- C Print Prime Numbers
- C Find Discount Purchase
- C Calculate Parcel Charge
- C Calculate Wage of Labor
- C Print Phone Bill
- C Conversion programs
- C Decimal to Binary
- C Decimal to Octal
- C Decimal to Hexadecimal
- C Binary to Decimal
- C Binary to Octal
- C Binary to Hexadecimal
- C Octal to Decimal
- C Octal to Binary
- C Octal to Hexadecimal
- C Hexadecimal to Decimal
- C Hexadecimal to Binary
- C Hexadecimal to Octal
- C Pattern Programs
- C Pattern Printing Programs
- C Print Diamond Pattern
- C Print Floyd's Triangle
- C Print Pascal's Triangle
- C Array Programs
- C 1D Array Programs
- C Linear Search
- C Binary Search
- C Largest Element in Array
- C Smallest Element in Array
- C Second Largest/Smallest
- C Count Even Odd
- C Array Element at Even
- C Array Element at Odd
- C Print Even Array Elements
- C Print Odd Array Elements
- C Sum/Product of Even/Odd
- C Reverse an Array
- C Insert Element in Array
- C Delete Element from Array
- C Merge Two Arrays
- C Bubble Sort
- C Selection Sort
- C Insertion Sort
- C Print Common Elements
- C 2D Array Programs
- C Add Two Matrices
- C Subtract Two Matrices
- C Transpose a Matrix
- C Multiply Two Matrices
- C Sum All Matrix Elements
- C Largest Element in Matrix
- C Print Row Column Total
- C 3D Array Programs
- C String Programs
- C Print String
- C Find Length of String
- C Compare Two String
- C Copy a String
- C Concatenate String
- C Reverse a String
- C Count Vowels Consonants
- C Replace Vowel in String
- C Delete Vowels from String
- C Delete Word from String
- C Frequency of Character
- C Count Word in String
- C Remove Spaces from String
- C Sort a String
- C Sort String in Alphabetical
- C Sort Words in Ascending
- C Sort Words in Descending
- C Uppercase to Lowercase
- C Lowercase to Uppercase
- C Swap Two Strings
- C Check Anagram or Not
- C Check Palindrome String
- C Print Number in Words
- C Print Successive Character
- C Character without Space
- C Remove Extra Spaces
- C File Programs
- C Read a File
- C Write Content to File
- C Read & Display File
- C Copy a File
- C Merge Two Files
- C Reverse File
- C Count All Character in File
- C List Files in Directory
- C Encrypt & Decrypt a File
- C Delete a File
- C Misc Programs
- Generate Random Numbers
- C Print Date Time
- C Print Message with Time
- C Get IP Address
- C Print Smiling face
- C Pass Array to Function
- Add Two Numbers using Pointer
- C Address of Variable
- C Shutdown Computer
- C Programming Tutorial
- C Tutorial
- C Programming Library
- C Standard Library
- C Programming Test
- C Programming Test
- Give Online Test
- All Test List

# C Program to Print Fibonacci Series

In this tutorial, you will learn and get code about printing of Fibonacci series with and without using function. But before going through the program, let's first understand about Fibonacci series.

### What is Fibonacci Series ?

Fibonacci series is a series of numbers, starts from **0** and **1**. Thereafter, the next number will be the
summation of previous two numbers. For example,

0 1 1 2 3 5 8 13 21.....

That is, the first and second number is 0 and 1, thereafter

- third number = first+second
- Therefore, third number = 0+1 (equals 1)
- fourth number = third+second
- Thereafter, fourth number = 1+1 (equals 2)
- fifth number = fourth+third
- Thereafter, fifth number = 2+1 (equals 3)
- and so on

Now let's move on and implement it in a C program.

## Fibonacci Series without using Function

The question is, **write a program in C to print Fibonacci series upto N term. The value of N must be taken
by user (at run-time).** The answer to this question is:

#include<stdio.h> #include<conio.h> int main() { int a=0, b=1, c, N, temp, i; printf("Enter the value of N (limit): "); scanf("%d", &N); for(i=1; i<=N; i++) { if(i==1) c = 0; else if(i==2 || i==3) c = 1; else { temp = a; a = b; b = c; c = a+b; } if(i==N) printf("%d", c); else printf("%d, ", c); } getch(); return 0; }

As the program was written under **Code::Blocks** IDE, therefore after successful build and run, you will get the following output:

Provide the value of N (limit), that is how many term of Fibonacci series you wants to print:

#### Program Explained

- Initialize the first number say
**a**with 0 and the second number say**b**with 1 at beginning of the program - Receive the value of limit say
**N** - Create a for loop to run from
**1**to**N**(the limit provided by user at run-time) - Inside the
**for**loop:- initialize
**0**to third number say**c**if**i**is equal to 1 - initialize
**1**to third number say**c**if**i**is equal to 2 or 3 - otherwise, initialize the summation of first and second number say
**a+b**to the third number say**c**

- initialize
- Before initializing
**a+b**to**c**, make sure to initialize**b**to**a**and**c**to**b**using**temp**variable - Then print the value of third number say
**c**

## Using Function to Print Fibonacci

Here is another program that works same as of previous one. The only difference is that this program uses a user-defined
function **printFibo()** to print the Fibonacci series:

#include<stdio.h> #include<conio.h> void printFibo(int); int main() { int N; printf("Enter the value of N (limit): "); scanf("%d", &N); printFibo(N); getch(); return 0; } void printFibo(int n) { int i, a=1, b=1, c, temp; for(i=1; i<=n; i++) { if(i==1) c = 0; else if(i==2 || i==3) c = 1; else { temp = a; a = b; b = c; c = a+b; } if(i==n) printf("%d", c); else printf("%d, ", c); } }

Here is the final snapshot of the first sample run:

Here is the final snapshot of another sample run:

## Using Function to Return Fibonacci Series

Let's modify the previous program that will also print the Fibonacci series but using the function that returns values. Here we have created a function in such a way that it will return each and every term of Fibonacci series one by one:

#include<stdio.h> #include<conio.h> int getFibo(int); int main() { int N, i, fib; printf("Enter the value of N (limit): "); scanf("%d", &N); for(i=1; i<=N; i++) { fib = getFibo(i); if(i==N) printf("%d", fib); else printf("%d, ", fib); } getch(); return 0; } int getFibo(int i) { static int a=0, b=1, c; int temp; if(i==1) c = 0; else if(i==2 || i==3) c = 1; else { temp = a; a = b; b = c; c = a+b; } return c; }

Here is the final snapshot of the sample run of above program that was created using function with return value:

If user supplies the limit as **10**, then 10 starting term of Fibonacci series will be printed at output screen and the function
created in above program named **getFibo()** will also run 10 times to return each and every term of Fibonacci series one by one.

Here I've used **static** type variable for **a**, **b** and **c** to remember its previous value throughout the program.

#### Same Program in Other Languages

« Previous Program Next Program »