Cube (arithmetic)
In arithmetic
Arithmetic or arithmetics is the oldest and most elementary branch of mathematics, used by almost everyone, for tasks ranging from simple day-to-day counting to advanced science and business calculations. It involves the study of quantity, especially as the result of combining numbers...

 and algebra
Algebra is the branch of mathematics concerning the study of the rules of operations and relations, and the constructions and concepts arising from them, including terms, polynomials, equations and algebraic structures...

, the cube of a number n is its third power
Exponentiation is a mathematical operation, written as an, involving two numbers, the base a and the exponent n...

 — the result of the number multiplying by itself three times:
n3 = n × n × n.

This is also the volume
Volume is the quantity of three-dimensional space enclosed by some closed boundary, for example, the space that a substance or shape occupies or contains....

 formula for a geometric cube with sides of length n, giving rise to the name. The inverse
Inverse function
In mathematics, an inverse function is a function that undoes another function: If an input x into the function ƒ produces an output y, then putting y into the inverse function g produces the output x, and vice versa. i.e., ƒ=y, and g=x...

 operation of finding a number whose cube is n is called extracting the cube root of n.