Variables

Basic Types

While there are numerous variable types in Java, here are the five most critical types used in FTC.

• int
• float
• double
• string
• boolean

Integer

The int variable holds a numerical value that can be accessed when called upon. It can hold integers or whole numbers.

 int inchCount;
 inchCount = 6; 

Float

The float variable is used to represent numbers that have a decimal place in them. It is similar to the int variable type, but can hold up to 7 digits of precision.

float decimal = (float) 3.2;
float d = 3.2f;

Double

The double variable is more precise than the float variable type because this type of variable can hold up to 16 digits of precision.

double numeral = 5.6;
numeral = 2.4;

String

A string variable is used to show a line of text, numbers, or symbols.

String message1 = new String("This is how to write a string!");
String message2 = "Wow this is amazing!"; 

Boolean

A boolean variable basically tells if an instance is true or false. For example, if one action is deemed true, then it will carry out a specific action.

boolean value = true;
 
if (value == true) {
 	System.out.println("this is true");
} else {
 	System.out.println("this is false");
}