1. Introduction
Finding the power of a number is a basic arithmetic operation that involves multiplying the number by itself a certain number of times. In this guide, we will learn how to raise a number to a power using a Swift program.
2. Program Overview
The program will utilize a base number and an exponent. It will then raise the base number to the power of the exponent. For example, if the base is 2 and the exponent is 3, the result will be \(2^3 = 2 * 2 * 2 = 8\).
3. Code Program
// Define the base and the exponent
let base = 5
let exponent = 3
// Function to compute the power of a number
func power(base: Int, exponent: Int) -> Int {
var result = 1
for _ in 1...exponent {
result *= base
}
return result
}
let computedPower = power(base: base, exponent: exponent)
print("\(base) raised to the power of \(exponent) is: \(computedPower)")
Output:
5 raised to the power of 3 is: 125
4. Step By Step Explanation
1. let base = 5 and let exponent = 3: We start by specifying the base number and its exponent. Here, we'll raise 5 to the power of 3.
2. The power function calculates the result by initializing a result variable to 1. Then, using a loop that runs for the number of times specified by the exponent, we repeatedly multiply the result by the base.
3. The for-loop _ in 1...exponent iterates the multiplication process exponent number of times.
4. After computing the power using our function, we display the output with a print statement, showcasing the base, the exponent, and the result.
This simple looping method provides an easy and clear way to compute the power of a number in Swift, especially for small exponent values.
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