So rand() is a pseudo-random number generator which chooses a natural number between 0 and RAND_MAX, which is a constant defined in cstdlib (see this article for a general overview on rand()). Now what happens if you want to generate a random number between say 0 and 2? For the sake of explanation, let’s say … Read more
Unlike C or C++, Python’s modulo operator (%) always return a number having the same sign as the denominator (divisor). Your expression yields 3 because (-5) / 4 = -1.25 –> floor(-1.25) = -2 (-5) % 4 = (-2 × 4 + 3) % 4 = 3. It is chosen over the C behavior because … Read more
Number.prototype.mod = function (n) { return ((this % n) + n) % n; }; Taken from this article: The JavaScript Modulo Bug
Most explanations miss one important step, let’s fill the gap using another example. Given the following: Dividend: 16 Divisor: 6 The modulus function looks like this: 16 % 6 = 4 Let’s determine why this is. First, perform integer division, which is similar to normal division, except any fractional number (a.k.a. remainder) is discarded: 16 … Read more
Here’s an explanation in layman’s terms. Let’s assume you want to fill up a library with books and not just stuff them in there, but you want to be able to easily find them again when you need them. So, you decide that if the person that wants to read a book knows the title … Read more
The % operator in C is not the modulo operator but the remainder operator. Modulo and remainder operators differ with respect to negative values. With a remainder operator, the sign of the result is the same as the sign of the dividend (numerator) while with a modulo operator the sign of the result is the … Read more
How to get the separate digits of an int number?
The % (modulo) operator yields the remainder from the division of the first argument by the second. The numeric arguments are first converted to a common type. A zero right argument raises the ZeroDivisionError exception. The arguments may be floating point numbers, e.g., 3.14%0.7 equals 0.34 (since 3.14 equals 4*0.7 + 0.34.) The modulo operator … Read more