Primitive Data Types

Primitive data types are the most basic data types available in Java. They are used as building blocks in order to further manipulate data. Their only objective is to store a particular kind of value, which we will delve into below. They are passed by pass by value.

Primitive Data Types: int, double, char, byte, float, and long

Integers: Integers are essentially non-fractional numbers.

• They can be positive, negative, or zero.
• While writing code, we write them as int. The wrapper class however, is written as Integer.
• They each take 32 bits of storage and have maximum and minimum values. If it goes out of range, it overflows will either give you an error or overflow Eg: If it goes to Integer.MAX_VALUE(), then one over would go back straight to Integer.MIN_VALUE(). This is ONLY applicable when performing an operation which produces a value that is out of range.
• Default Value: 0

If a value that is out of range is tried to be directly stored in a variable Eg: int x=283749827489274924; it will not compile and give you an error like Main.java:17: error: integer number too large

Doubles: They store decimal values.

• They can store up to 16 digits after the decimal place.
• While writing code, we write them as double. The wrapper class however, is written as Double.
• They take up 64 bits of storage