Print a sequence using a loop in C . 1,2,5,6,9,10,13,14,17,18-CodePudding

Please help write a C Program to print this sequence

1,2,5,6,9,10,13,14,17,18 up to 500. I need it for my homework as a student. I tried

#include <iostream>
using namespace std;
int main()
{
    for (int i = 1; i < 454; i  ) {
        if (i = i   1) {
            continue;
        }
    }
    return 0;
}

CodePudding user response：

I guess this is what you were looking for

#include <iostream>

int main()
{
    for (int i = 1; i <= 500; i  ) {
        if (i % 4 == 1 || i % 4 == 2) {
            std::cout << i << ',';
        }
    }
    std::cout << '\n';
}

If the remainder after dividing a number by 4 is 1 or 2 then print the number.

CodePudding user response：

Assuming the sequence is defined as alternating increments of 1 and 3 i.e., 1, 3, 1, 3, 1, ... perhaps you can use a while loop:

#include <iostream>

int main() {
  int i = 0, x = 1;
  while (x <= 500) {
    std::cout << x << '\n';    // Print current value of x.
    x  = i == 1 ? 3 : 1;       // Increment x based on value of i.
    i ^= 1;                    // Toggle i between 1 and 0.
  }
}

Output: