Variables
int number = 1;
Variables are named objects of a specified data type that we can assign a value to.
Declaring (or defining) a variable means giving it a name.
You can declare a variable this way:
var variableName;
Initializing a variable means giving it an initial value.
We can do just that with the
= sign:var variableName = 25;
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:
int variableName = 25;
float variableName2 = 25.01;
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:// This will be assumed to be an int
var variableName = 25;
// This will be assumed to be a float
var variableName2 = 25f;
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.
Last modified 1yr ago