swift

Generate Random Number()

Parameters: lowerBound: Int, upperBound: Int

Lower and upper bounds for the random number

Returns: Returns a randomly generated integer within the specified bounds.

The function utilizes Swift's built-in functions to generate a random number (either integer or float). It produces an unpredictable number every time it's called.

functions
number generation
variable declaration
Swift standard library
Easy dificulty

How to Write a Swift Function for Generating Random Numbers

Hello to all you programmers out there! In this blog post, we will walk you through how to program a function to generate random numbers in Swift. Our step-by-step guide will ensure that you can follow along easily. Sit back, relax, and let's dive into some coding.

Step 1: Import the Required Library

The first thing we need to do is to import the Swift standard library, which gives us access to the random number generator functions.

import Swift

Step 2: Define the Function

Let's start by defining the function generateRandomNumber. This function doesn't take any arguments.

func generateRandomNumber() {
}

Step 3: Generate the Random Number

Now, we will generate the random number. Swift has a built-in function for this, called random(in:). This function generates a random number from a given range.

Inside generateRandomNumber we can use it to get a random number from 0 to 100.

func generateRandomNumber() {
   let randomNumber = Int.random(in: 0..<100)
}

Step 4: Return the Random Number

We want our function to return the generated random number, so we need to declare that in the function definition and return the number at the end of the function.

func generateRandomNumber() -> Int {
   let randomNumber = Int.random(in: 0..<100)
   return randomNumber
}

Step 5: Test the Function

Finally, we can test our function by calling it and printing the generated random number.

print(generateRandomNumber())

This will print a random number from 0 to 99 each time you run the code.

Conclusion

Random number generation is a common task in programming. Swift provides a built-in function for this, making it very easy to generate random numbers in a given range. The complete code to generate a random number between 0 and 99 in Swift is:

import Swift

func generateRandomNumber() -> Int {
   let randomNumber = Int.random(in: 0..<100)
   return randomNumber
}

print(generateRandomNumber())

Learn function in:

Random Number Generation

Generating a random number in a given range

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Mathematical principle

The function uses the concept of pseudo-random number generation technique, where the numbers produced follow a certain statistical distribution in a specific sequence. However, they are not genuinely random because they are determined by a small set of initial values.

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