Data Types

Variables are often assigned data types so that programmers can restrict what can be done with the data. There are numeric types indicated often in many object oriented languages using 'int' keyword. There are also strings or text, boolean for true and false and char to represent a single character. Other languages like JavaScript or Python do not have explicit assigned types but the compiler will interpret the type based on its assigned value.

Select Languages

Examples

C

int carCount = 2;
unsigned int age = 15;
signed short int seaLevel = -10000;
long long int usBudget = 11000000000;
unsigned long long int lightSpeed = 11799312874;
float myGPA = 3.45f;
double piValue = 3.14159265;
char lastLetter = 'Z';
char myName[] = "Joe";

#include <stdbool.h>
bool isMale = true;

C#

int carCount = 2;
uint age = 15;
short seaLevel = -10000;
long usBudget = 11000000000;
ulong lightSpeed = 11799312874;
float myGPA = 3.45F;
double piValue = 3.14159265D;
char lastLetter = 'Z';
bool isMale = true;
string myName = "Joe";

C++

int carCount = 2;
unsigned int age = 15;
signed short int seaLevel = -10000;
long long int usBudget = 11000000000;
unsigned long long int lightSpeed = 11799312874;
float myGPA = 3.45f;
double piValue = 3.14159265;
char lastLetter = 'Z';
bool isMale = true;

#include <iostream>
using namespace std;
string myName = "Joe";

Go

var carCount int = 2;
var age uint8 = 15
var seaLevel int16 = -10000;
var usBudget int64 = 11000000000;
var lightSpeed uint64 = 11799312874;
var myGPA float32 = 3.45;
var piValue float64 = 3.14159265;
var isMale bool = true;
var lastLetter string = "Z";
var myName string = "Joe";

Java

int carCount = 2;
int age = 15;
short seaLevel = -10000;
long usBudget = 11000000000L;
long lightSpeed = 11799312874L;
float myGPA = 3.45f;
double piValue = 3.14159265;
char lastLetter = 'Z';
boolean isMale = true;
String myName = "Joe";

JavaScript

let carCount = 2;
let age = 15;
let seaLevel = -10000;
let usBudget = 11000000000;
let lightSpeed = 11799312874;
let myGPA = 3.45;
let piValue = 3.14159265;
let lastLetter = 'Z';
let isMale = true;
let myName = 'Joe';

Kotlin

val carCount: Int = 2;
val age: Byte = 15;
val seaLevel: Short = -10000;
val usBudget: Long = 11000000000L;
val lightSpeed: Long = 11799312874L;
val myGPA: Float = 3.45F;
val piValue: Double = 3.14159265;
val lastLetter: Char = 'Z';
val isMale: Boolean = true;
val myName: String = "Joe";

MatLab

carCount = 2;
age = 15;
seaLevel = -10000;
usBudget = 11000000000;
lightSpeed = 11799312874;
myGPA = 3.45;
piValue = 3.14159265;
lastLetter = 'Z';
isMale = true;
myName = 'Joe';

PHP

$carCount = 2;
$age = 15;
$seaLevel = -10000;
$usBudget = 11000000000;
$lightSpeed = 11799312874;
$myGPA = 3.45;
$piValue = 3.14159265;
$lastLetter = 'Z';
$isMale = true;
$myName = "Joe";

Python

carCount = 2
age = 15
seaLevel = -10000
usBudget = 11000000000
lightSpeed = 11799312874
myGPA = 3.45
piValue = 3.14159265
lastLetter = 'Z'
isMale = true
myName = 'Joe'

R

carCount <- 2
age <-15
seaLevel <- -10000
usBudget <- 11000000000
lightSpeed <- 11799312874
myGPA <- 3.45
piValue <- 3.14159265
lastLetter <- "Z"
isMale <- TRUE
myName <- "Joe"

Ruby

carCount = 2
age = 15
seaLevel = -10000
usBudget = 11000000000
lightSpeed = 11799312874
myGPA = 3.45
piValue = 3.14159265
lastLetter = "Z"
isMale = true
myName = "Joe"

Rust

let carCount = 2;
let age = 15;
let seaLevel = -10000;
let myGPA = 3.45;
let piValue = 3.14159265;
let lastLetter = "Z";
let isMale = true;
let myName = "Joe";

Scala

var carCount: Int = 2
var age: Byte = 15
var seaLevel: Short = -10000
var usBudget: Long = 11000000000L
var lightSpeed: Long = 11799312874L
var myGPA: Float = 3.45f
var piValue: Double = 3.14159265
var lastLetter: Char = 'Z'
var isMale: Boolean = true
var myName: String = "Joe"

Swift

var carCount: Int = 2;
var age: UInt8 = 15;
var seaLevel: Int16 = -10000;
var usBudget: Int64 = 11000000000;
var lightSpeed: UInt64 = 11799312874;
var myGPA: Float = 3.45;
var piValue: Double = 3.14159265;
var isMale: Bool = true;
var lastLetter: Character = "Z";
var myName: String = "Joe";

TypeScript

let carCount:number = 2;
let age:number = 15;
let seaLevel:number = -10000;
let usBudget:number = 11000000000;
let lightSpeed:number = 11799312874;
let myGPA:number = 3.45;
let piValue:number = 3.14159265;
let lastLetter:string= 'Z';
let isMale:boolean = true;
let myName:string = 'Joe';

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