Question

How to create an M x N matrix with random numbers in Swift

Answer 1

import Foundation

let ROWS = 4
let COLS = 5

// Print matrix to console
func printMatrix(_ matrix: [[Int]]) {
    for row in matrix {
        let formatted = row.map { String(format: "%4d", $0) }.joined()
        print(formatted)
    }
}

// Generate a random integer between min and max inclusive
func generateRandomInteger(min: Int, max: Int) -> Int {
    return Int.random(in: min...max)
}

// Generate a rows x cols matrix filled with random integers
func generateRandomMatrix(rows: Int, cols: Int) -> [[Int]] {
    var matrix: [[Int]] = []
    for _ in 0..<rows {
        var row: [Int] = []
        for _ in 0..<cols {
            row.append(generateRandomInteger(min: 1, max: 100))
        }
        matrix.append(row)
    }
    
    return matrix
}

func main() {
    let matrix = generateRandomMatrix(rows: ROWS, cols: COLS)
    
    printMatrix(matrix)
}

main()




/*
run:
    
  63  96  57  83  42
  16  40  89  98  30
   4  96  72  23  35
  42  36  36  13  25
    
*/

 

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