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arduino variable

What is Variable in Arduino

In short What is Variable in Arduino

  • A variable is a named unit of data that may be assigned a value.
  • variable is a named location in a memory where a program can manipulate the data. This location is used to hold the value of the variable.
  • The value of the C variable may get change in the program.
  • variable might be belonging to any of the data type like int, float, char etc.

What is Variable in Arduino 1

RULES FOR NAMING VARIABLE

  • Variable name must begin with letter.
  • Variables are case sensitive
  • They can be constructed with digits, letters.
  • No special symbols are allowed other than underscore.
  • sum, height ,name ,age are some examples for variable name

Example :

int led=5;

(int data type led is defined as 5 ) in entire program led is know for its value 5.

int age= 26;

(int data type age is defined as 26 ) in entire program age is know for its value 26.

age=age+2;

now age has 28 in its value. but age is name of variable in memory until program execution.

variable in arduino training

 

 

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