The following is a program that calculates the value of PI based on the following formula: π/4≈1-1/3+1/5-1/7+⋯ Please complete the program by using c

Sure, here's the completed program:

#include <stdio.h>

int main() {
    int n = 0;
    double pi = 0.0, term = 1.0;

    while (1) {
        pi += term;
        n++;
        term = -term / (2 * n - 1);
        if (term < 1e-6) {
            break;
        }
    }

    pi *= 4;
    printf("The value of pi is %.6f\n", pi);

    return 0;
}

Explanation:

- We start by initializing the variables `n`, `pi`, and `term`.
- We enter a loop that keeps adding `term` to `pi` and updating the value of `term` based on the formula.
- The loop continues until the absolute value of `term` becomes smaller than a certain threshold (`1e-6` in this case).
- After the loop, we multiply `pi` by 4 to get the approximation of `pi`.
- Finally, we print the value of `pi` with 6 decimal places using the `printf` function.