Variable (computer science)

A variable in a program is a place where data is stored and put it or set. In most computer languages it is used by typing var, or const.

In some languages like Python you do not need to define what type the variable is, but in C or Java you must define what type it is.

Python example of it's type system.x = 10 
print(x + 1) # this displays '11' on the screen
x = "Hello, World"
print(x) # this displays 'Hello, World' on the screenIn this code snippet it shows how you can change the type of a variable. That means it is dynamically typed.

C example of it's type system// this defines a variable 'x' with type int
int x = 10; 
// this defines a variable 'y' with type char
char y = 'H';
// this defines a variable 'z' with type *char 
char z[] = {y, 'e', 'l', 'l','o', ' ', 'W','o','l','d'}; In C you cannot change the type of a variable. That means it is statically typed.

Category:Computer science