Java variable declaration

I started learning Java from today, so I hope it will be helpful for those who read the output.

First of all, what are variables and variable declaration statements?

Variables are like boxes that you prepare inside your computer to store data. In other words, a variable declaration is a statement that tells the computer to "prepare a new variable."

Variable declaration statement

Type variable name;

A type is the type of data that can be stored in a variable.

Commonly used mold types (there are others)

Classification	Model name	Data to store
integer	int	普通のinteger
a few	double	Ordinary decimal
Boolean value	boolean	true or false
letter	char	1つのletter
String	String	Character sequence

Example of use

This time, I would like to introduce my car as an example. twitter

Classification	Model name	Data to store	If you compare it with your car (look)
integer	int	普通のinteger	amount:Amount of money
a few	double	普通のa few	weight:weight
Boolean value	boolean	true or false	sell:Sell or not sell
letter	char	1つのletter	value:Treasure
String	String	Character sequence	comment:I love you

I actually wrote it. The boolean value will be learned from now on, so it is omitted.

`look.java`



public class Main {
  public static void main(String[] args) {
    int amount = 700000; //Substitute a value in the amount box
    System.out.println(amount); //Description to call
    double weight = 7.9; //Substitute the value in the weight box
    System.out.println(weight); //Description to call
    char value = 'Treasure'; //Substitute a value in the value box
    System.out.println(value); //Description to call
    String comment = "I love you"; //Assign a value to the comment box
    System.out.println(comment); //Description to call
  }
}

Execution result

700000
7.9
Treasure
I love you

Impressions

Actually, it was my first time to post an article. It takes 2 hours to create an article. (It took a lot) As a goal, I will post articles once a week. Thank you to everyone who read to the end!

About Java variable declaration statements