Operators

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There are a few basic math operators that you will use in almost every program you ever write. These are: +-*/ or , in writing, plus, minus, times and divide.

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So how do you use them in your program? Let's find out.

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Lets start with a variable:

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int myNumber = 0;

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So we have a variable with the number 0 in it. Now lets add 5 to it.

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myNumber = myNumber + 5;
Console.WriteLine(myNumber);
Console.ReadLine();

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Now when you run the program the number 5 will show on the screen. Was that simple or what? And it's the same for any of these operators.

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But that looks a bit ugly doesn't it? Stating the variable twice. Here's a way of making it look better.

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myNumber += 5

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Now what we are saying is "take the variable myNumber and add 5 to it." Looks better doesn't it? Either way works and will remain up to you which method you prefer.

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Displaying Multiple Variables

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Ok so now we'll see how to display several variables at once.

Lets start with 3 strings

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string myString1 = "Hello";
string myString2 = "World";
string space = " ";

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Now look at how simple it is to display them together:

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Console.WriteLine(myString1 + space + myString2);

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That will output "Hello World"

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But if you don't want to use a variable to hold the space then thats easy to do as well.

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Console.WriteLine(myString1 + " " + myString2);

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This will give us the exact same result while taking up less memory.

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So finally in the next chapter we're going to see how to accept user input and use it in an output. So hop on over and I'll see you there.

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