This if statement checks if the input value X is less than or equal to zero ($X \le 0$).If the condition is True (meaning the input is zero or a negative number), it ...
A function named euler_phi(n) that computes Euler's totient function φ(n): the number of integers from 1 up to n that are coprime with n (i.e., integers k with gcd(k, n) == 1). Notes and Working of ...
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