RANDOM() in AP Pseudocode

The AP CSP reference sheet provides RANDOM(a, b) which returns a random integer between a and b, inclusive. Both endpoints are possible.

import random

flip = random.randint(0, 1)  # 0=heads 1=tails
roll = random.randint(1, 6)  # die roll
idx  = random.randint(0, 3)  # list index

flip <- RANDOM(0, 1)
roll <- RANDOM(1, 6)
idx  <- RANDOM(1, 4)

Range of RANDOM Expressions

For RANDOM(1,6) + RANDOM(1,6): min = 1+1=2, max = 6+6=12. Each call is independent -- getting 1 on the first doesn't change probabilities on the second.

Practice Problems