Example: C program to generate the Fibonacci series using iteration

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// 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;
}