java data types
Data Type Size Stores
byte 1 byte whole numbers from -128 to 127
short 2 bytes whole numbers from -32,768 to 32,767
int 4 bytes whole numbers from -2,147,483,648 to 2,147,483,647
long 8 bytes whole numbers from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
float 4 bytes fractional numbers; sufficient for storing 6 to 7 decimal digits
double 8 bytes fractional numbers; sufficient for storing 15 decimal digits
boolean 1 bit true or false values
char 2 bytes single character/letter or ASCII values
/*JavaScript data types*/
//string
var string = 'ASCII text';
//int
var integer = 123456789;
//float
var float = 123.456;
//boolean, can be true or false
var t = true;
var f = false;
//undefined
var undef;//defaults to undefined
var undef = undefined;//not common, use null
//null
var nul = null;
//array
var arr = ['Hello','my','name','is','Dr.Hippo',123,null];
//object
var person = {'name':'John Smith','age':27};
//function
var fun = function(){
return 42;
}
/*
Java Data Types
There 2 Types Of Data Types In Java
1) Primitive -> byte, char, short, int, long, float, double and boolean.
2) Non-primitive -> (All Classes) -> String, Arrays etc.
Type Size Stores
byte 1 byte whole numbers from -128 to 127
short 2 bytes "" -32,768 to 32,767
int 4 bytes "" -2,147,483,648 to 2,147,483,647
long 8 bytes ""-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
float 4 bytes fractional numbers; for storing 6 to 7 decimal digits
double 8 bytes fractional numbers; "" 15 ""
boolean 1 bit true or false values
char 2 bytes single character/letter or ASCII values
*/
Primitive types are the most basic data types available within the Java language. There are 8: boolean , byte , char , short , int , long , float and double . These types serve as the building blocks of data manipulation in Java. Such types serve only one purpose — containing pure, simple values of a kind.
<?php
/*
Variables can store data of different types, and different data types can do different things.
PHP supports the following data types:
1) String
2) Integer
3) Float (floating point numbers - also called double)
4) Boolean
5) Array
6) Object
7) NULL
8) Resource
*/
// PHP String
$x = "Hello world!";
echo $x;
//PHP Integer
$x = 5985;
var_dump($x);
//PHP Float
$x = 10.365;
var_dump($x);
//PHP Boolean
$x = true;
$y = false;
//PHP Array
$cars = array("Volvo","BMW","Toyota");
var_dump($cars);
//PHP Object
class Car {
function Car() {
$this->model = "VW";
}
}
// create an object
$herbie = new Car();
// show object properties
echo $herbie->model;
//PHP NULL Value
$x = "Hello world!";
$x = null;
var_dump($x);
?>