if statements, or store in variables.random function returns a different random number every time you call it.visited(string node_name)visted returns a boolean value of true if the node with the title of node_name has been entered and exited at least once before, otherwise returns false. Will return false if node_name doesn't match a node in project.visited_count(string node_name)visted_count returns a number value of the number of times the node with the title of node_name has been entered and exited, otherwise returns 0. Will return 0 if node_name doesn't match a node in project.random()random returns a random number between 0 and 1 each time you call it.random_range(number a, number b)random_range returns a random integer between a and b, inclusive.dice(number sides)dice returns a random integer between 1 and sides, inclusive.dice(6) returns a number between 1 and 6, just like rolling a six-sided die.round(number n)round rounds n to the nearest integer.round_places(number n, number places)round_places rounds n to the nearest number with places decimal points.floor(number n)floor rounds n down to the nearest integer, towards negative infinity.ceil(number n)ceil rounds n up to the nearest integer, towards positive infinity.inc(number n)inc rounds n up to the nearest integer. If n is already an integer, inc returns n+1.dec(number n)inc rounds n down to the nearest integer. If n is already an integer, inc returns n-1.decimal(number n)decimal returns the decimal portion of n. This will always be a number between 0 and 1. For example, decimal(4.51) will return 0.51.int(number n)int rounds n down to the nearest integer, towards zero.floor, because floor rounds to negative infinity.