Arrays, Loops, Imports

Package:

package = directory

You can compile more than one Java file in one place by importing packages

> There are three levels of packet definition

• Package statement: Identifies the package of the class itself
• Imports: import categories from other files
• Class or interface definitions: for the class

>> The import can be for an entire class or a private part of it, or even the full name of the class can be satisfied on the line I want to use it in.. > Using any of them does not affect memory. > The order doesn’t matter > There are classes that do not need to be called, such as String and system

LOOPs:

Loop is a type of programming command that is used when needed to execute programming statements a number of times according to a specific condition

>> Java provides different types of loops, each with a special use:

• For Loop: Used when the number of iterations is known in terms of start and end..
• While Loop: Used when the number of times the code is executed is unknown, dependent on the fulfillment of a condition.
• Do-While Loop: Similar to while with the exception that the code is executed at least once even if the condition is not met.