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  3. Project Euler #1: Multiples of 3 and 5
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Project Euler #1: Multiples of 3 and 5

  • neiln
     + 0 comments

    KOTLIN Code

    • TC 2 & 3 checks if your code handles large numbers, use Long instead of Int.
    private fun calculateMultipleSums(n: Int){
    /*
        100/3 = 33
        100/5 = 20
        100/15 = 6        
    
        (n*(n+1))/2
    */
		
    val sumOfThree = 3* findSum(findMultiplier(n, 3))
    val sumOfFive = 5* findSum(findMultiplier(n, 5))
    val sumOfFifteen = 15* findSum(findMultiplier(n, 15))
    
    println( sumOfThree +sumOfFive - sumOfFifteen)
}

private fun findSum(n: Long): Long{
    return (n * (n+1))/2
}
private fun findMultiplier(n: Int, m: Long): Long{
    return ((n-1)/m)
}