Lesson 4.5 · Write it

Integer power

A functionPython or Java7 tests, 4 of them hidden

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Write a function that returns base raised to the power exponent, using a loop, not a built-in power function.

base and exponent are whole numbers, chosen so that the answer is from -1000000000 to 1000000000, and exponent is at most 100.
exponent is always 0 or positive.
Anything raised to the power 0 is 1.
Do not use ** (Python) or Math.pow (Java).

Only the number your function returns is checked.

def int_power(base: int, exponent: int) -> int

You cannot use these in this question:

pow()
.__pow__()
import math
import cmath

This question is about writing the loop yourself, so built-in power functions are not allowed.

Examples

Your function is tested on 7 cases: the 3 examples below, and 4 hidden ones that check the rules above.

int_power(2, 3) should return 8: 2 cubed is 8 (rule 1)
int_power(5, 0) should return 1: anything to the power 0 is 1 (rule 3)
int_power(3, 2) should return 9: 3 squared is 9 (rule 1)

public static int intPower(int base, int exponent)

Running Java here comes later. You can put this answer's lines in order instead. You can still write your Java answer (it stays while this page is open) and compare it with our worked solution. Or try this exercise in Python.Checking whether Java answers can run here.

You cannot use these in this question:

Math.pow()

This question is about writing the loop yourself, so built-in power functions are not allowed.

Examples

Your function is tested on 7 cases: the 3 examples below, and 4 hidden ones that check the rules above.

intPower(2, 3) should return 8: 2 cubed is 8 (rule 1)
intPower(5, 0) should return 1: anything to the power 0 is 1 (rule 3)
intPower(3, 2) should return 9: 3 squared is 9 (rule 1)

solution.pySolution.java

def int_power(base: int, exponent: int) -> int:
    # your code here
    pass