Random Numbers Flashcards

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What is a random number in programming?

A number the program picks by chance, using a random function.

Numbers look random but are made by a fixed method.

RANDOM_INT(low, high) returns an integer from low to high, inclusive.

RANDOM() returns a real number from 0 up to, but not including, 1.

Call RANDOM_INT(1, 6). Each number 1 to 6 has the same chance.

Choose a random index: i = RANDOM_INT(0, length-1). Then use list[i].

A starting value that fixes the sequence. The same seed repeats it.

It makes random results repeat, so tests give the same outputs.

Each allowed value has an equal chance of being chosen.

Multiply RANDOM() by 10, take the whole number part, then add 1.

Forgetting whether the upper bound is included in the range.

Use RANDOM_INT(0, 1): 0 means False, 1 means True. Or use RANDOM() < 0.5.