C Program to Display Fibonacci Series

#include <stdio.h>

int main() {

  int i, n;

  // initialize first and second terms

  int t1 = 0, t2 = 1;

  // initialize the next term (3rd term)

  int nextTerm = t1 + t2;

  // get no. of terms from user

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

  scanf("%d", &n);

  // print the first two terms t1 and t2

  printf("Fibonacci Series: %d, %d, ", t1, t2);

  // print 3rd to nth terms

  for (i = 3; i <= n; ++i) {

    printf("%d, ", nextTerm);

    t1 = t2;

    t2 = nextTerm;

    nextTerm = t1 + t2;

  }

  return 0;

}

OUTPUT:

Enter the number of terms: 10
Fibonacci Series: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34,