C Language program to generate Fibonacci series up to given limit using For loop

Introduction: In this article i am going to explain the program to generate Fibonacci series/sequence up to the given limit using For loop in C Language.In previous articles i explained the programs to Calculate factorial of a number using for loop and Print table of entered number using For loop and Calculate sum,average and division of marks using else-if ladder and Get number of days in month and year using else if ladder and Find greatest of three numbers using nested if else statement and Goto statement in C language,its advantages and disadvantages with program example.

Description: In Fibonacci series or we can say Fibonacci sequence very first number is 0 and second number is 1 and further next number is sum/addition of previous two numbers.

Fibonacci series with first few numbers can be written as: 0 1 1 2 3 5 8 13 21 34 55.......

For example:

First Number = 0

Second Number = 1

Third Number = 0 + 1 =1

Fourth Number = 1 + 1 =2

Fifth Number = 2 + 1 =3

Sixth Number =3 + 2 = 5

Seventh Number = 5 + 3 =8 and so on...

Implementation: Let's create a program in C language to generate Fibonacci Series with For loop.

#include<conio.h>

#include<stdio.h>

int main()

{

   int i,n,first=0,second=1,fibo;

   clrscr();

   printf("Enter the number of terms: ");

   scanf("%d",&n);

   printf("\nFibonacci series:\n");

   printf("%d\t%d",first,second);

   for(i=0;i<n-2;i++)

    {

      fibo=first+second;

      first=second;

      second=fibo;

      printf("\t%d",fibo);

    }

  getch();

  return 0;

} 

• Run the program using Ctrl+F9

Output:

Enter the number of terms: 10

Fibonacci Series

0             1             1             2             3             5             8             13           21           34

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