A power is a number multiplied by itself a certain number of times.

an = a × a × ... × a (n kere)

Special cases:

• a0 = 1 (a ≠ 0)
• a1 = a
• a-n = 1/an
• 0n = 0 (n > 0)
• A fractional power of a negative number is a complex number.