Simple Java Guide - Part 2

Welcome to another guide by me

I will be demonstrating how to compute to numbers to get the product of the numbers.

Shall we start?

From my other guide you will have learn't to define a class.

Start with this:

Code:

class Compute {

Just like before we shall add

Code:

public static void main(String args[])

Now to call the numbers we will need to use the Integer method, Remember Integers will be the main statement you will use.


Add this:

Code:

int num;

This will declare that a variable will be used as a int and it will be called num

Time to assign a number to it:

Code:

num = 200;

Now lets print that bit out

Code:

System.out.println("This is num: " + num;

Now time to assign a second set to Multiply num

Code:

num = num * 2;

Ok now time to print the whole thing out!

Code:

System.out.print("The value of num * 2 is ");

Code:

System.out.println(num);

}

}

If you read my previous guide you will have learnt how to compile a program. So compile this and now open it up.

Your output display should show:

This is num: 100
The value of num * 2 is 200

num will be 100 so you will have multiplied 100 * 2

Hope you enjoyed this guide!

 

Very good, simple guide. Good thing you didn't try to sound like a smartass and just end up making it complicated for some. Good job!

 

Good job on making it easy. You get an A+

 

System.out.println("This is num: " + num);


you need the )... :/

you could do


int num = 200;

System.out.print("The value of num * 2 is " + num + "!");


thats better :/

 

looks good and straight forward. i enjoyed reading this thx alot

 

strait forward guide! 9/10

 

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Wrong.

You re-assigned the value of "num", so the value of "num" is actually now 400. num*2 would be 800.

Also, a few tips.

int num;
num = 200;

can be simplified to:

int num = 200;

num = num * 2; can be simplified to

num *= 2;