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Java

Posted by Jainil Patel
Jainil Patel
1,653 Points

How to solve project euler 1????????

HELP

James Simshaw
James Simshaw
28,738 Points

Hello,

In order to better help you, we need to know where you're having trouble with. Are you having trouble determing an algorithm to use to determine the answer or having trouble converting that algorithm into Java code?

Ken Alger
Ken Alger
Treehouse Teacher
Ken Alger
Ken Alger
Treehouse Teacher

Jainil;

Please post the code you are using.

Ken

2 Answers

Ken Alger
STAFF
Ken Alger
Treehouse Teacher
Ken Alger
Ken Alger
Treehouse Teacher

Jainil;

Euler 1

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

Find the sum of all the multiples of 3 or 5 below 1000.

public static void main(String[] args) {
    long sum = 0 ;
    for ( long i = 3 ; i < 1000 ; i+=3 ){
        sum+=i;
    }
    for ( long i = 5 ; i < 1000 ; i+=5 ){
        sum+=i;
    }       
    for ( long i = 15 ; i < 1000 ; i+=15 ){
        sum-=i;
    }
    System.out.println(sum);
}

or

public static void main(String[] args) {
    int sum = 0;
    for (int i = 3; i < 1000; i++) {
        if (i % 3 == 0 || i % 5 == 0) {
            sum += i;
        }
    }
    System.out.println(sum);
}

Should both get you going in the right direction.

Post back with other questions.

Happy coding,
Ken

Jainil Patel
Jainil Patel
1,653 Points
Jainil Patel
Jainil Patel
1,653 Points

Mainly I'm having trouble converting the algorithm into Java Code I'm just beginning to learn Java