# returns the absolute value of a number.
# returns the cube root of a number.
# returns the next integer greater than or equal to agiven number(rounding up).
# returns the next integer less than or equal to a given number(rounding down).
# returns the square root of number.
# returns the highest-value number in a list of number.
# returns the lowest-value number in a list of number.
# returns the base to the exponent power, that is , (xy) .
# Math.floor(Math.random() * 10) returns a random integer between 0 and 9 (both included .