Example: Fibonacci Series up to 100 in C using While loop

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// Fibonacci Series up to 100 in C using While loop
#include <stdio.h>

// It's the main function of the program
int main()
{
    int num;
    int term_1 = 0, term_2 = 1, next_term = 0;

    // Step-1 Take input from the User
    printf("INPUT POSITIVE NUMBER: ");
    scanf("%d", &num);

    // Step-2 Displays the first two terms which are always 0 and 1
    printf("\nFIBONACCI SERIES: %d, %d, ", term_1, term_2);

    // Step-3 Use a loop in this range of 1 to N positive numbers and get the next terms
    next_term = term_1 + term_2;
    while (next_term <= num)
    {
        printf("%d, ", next_term);
        term_1 = term_2;
        term_2 = next_term;
        next_term = term_1 + term_2;
    }

    return 0;
}