Example: C program to generate the Fibonacci series using iteration

#include <stdio.h>

​

int main() {

    int x, i, t1 = 1, t2 = 2, nt;

    // x denotes number of terms

    // t1 denotes term 1

    // t2 denotes term 2

    // nt denotes next term

    printf("Enter the number of terms to generate the fibonacci series::\n");

    scanf("%d", &x);

    printf("Fibonacci Series:: ");

    for (i = 1; i <= x; ++i) {

        printf("%d, ", t1);

        nt = t1 + t2;

        t1 = t2;

        t2 = nt;

    }

    printf("\n");

​

    return 0;

}