Variables
int number = 1;
Variables are named objects of a specified data type that we can assign a value to.

Usage

Declaring Variables

Declaring (or defining) a variable means giving it a name. You can declare a variable this way:
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var variableName;
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Initializing Variables

Initializing a variable means giving it an initial value. We can do just that with the = sign:
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var variableName = 25;
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Data Types

Each variable has a Data Type (also known as a primitive), such as...
Name
Description
Example Value
var
Default data type. The compiler will assume the most likely data type.
5
20.3f
true
int
Integer. A whole number between -2147483648 and 2147483647.
24
float
Floating-point. A decimal between 1.175494351 E - 38 and 3.402823466 E + 38.
24.01f
bool
Boolean. A true or false value. Can also be represented by 1 or 0.
true
1
You can initialize a variable with a specific data type if you want:
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int variableName = 25;
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float variableName2 = 25.01;
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In most cases, the compiler will assume a number is an int. You can put an f after any number to show that it's a float, even without a decimal point:
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// This will be assumed to be an int
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var variableName = 25;
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// This will be assumed to be a float
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var variableName2 = 25f;
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Conclusion

Now you know how to save whole numbers, decimals, and true/false values and refer to them by name. This will be very useful for re-using values in mathematic expressions and procedures.
With that in mind, you're ready to learn about a major component of procedures and variables.
Last modified 8mo ago