swift
Parameters: num1: Int, num2: Int
Two integer numbers for which we want to find the least common multiple
Returns: An integer which is the least common multiple of the input parameters
The find-lcm function, written in Swift, simplifies the process of finding the lowest common multiple of two numbers. This function takes two arguments, calculates, and returns their LCM.
Hello, fellow programmer! Welcome to this coding blog post. In the steps below, we will delve into Swift programming and explore how to code a function to find the least common multiple of two numbers. This function is useful in many areas of programming, so it's a good one to have in your coding toolbox. No fancy jargon, we'll focus on clear steps and explanations. Let's dive in!
In this tutorial, we will be creating a function in Swift to find the Least Common Multiple (LCM) of two integers. The LCM of two integers is the smallest positive integer that is perfectly divisible by the two given numbers.
// Initial Swift function that takes two integers
func find_lcm(num1: Int, num2: Int) {
// function content will go here
}
In order to find the LCM, we first need to calculate the greatest common divisor of the two numbers. We can use Swift’s gcd function for that.
func find_gcd(num1: Int, num2: Int) -> Int {
return num2 == 0 ? num1 : find_gcd(num2, num1 % num2)
}
The LCM is calculated by dividing the absolute multiplication of the two numbers by the GCD of the two numbers.
func find_lcm(num1: Int, num2: Int) -> Int {
let gcd = find_gcd(num1, num2)
return abs(num1 * num2) / gcd
}
To ensure the function is robust, we should add input validation to check that the user's input is valid (two non-zero integers). If invalid input is provided, the function should return 0.
func find_lcm(num1: Int, num2: Int) -> Int {
if num1 == 0 || num2 == 0 {
return 0
}
let gcd = find_gcd(num1, num2)
return abs(num1 * num2) / gcd
}
In conclusion, we have implemented a function to successfully find the LCM of two numbers. Please note that this implementation assumes that the function is only used with integer numbers.
In arithmetic and number theory, the LCM of two integers a and b, usually denoted by `lcm(a, b)`, is the smallest (positive) integer that is divisible by both a and b. For example, `lcm(5, 10)` would return `10`. The calculation of LCM is based on the principle of division and multiplication.
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