Constructor is a special keyword used in solidity for initializing state variables, in this article we will look at what constructor is and how to initialize a state variable with it.

State variable

This is a type of variable in solidity , that can be accessed from anywhere inside the contract in which they are being declared.

This is an example of a state variable below

Constructor

Constructor is a special keyword in solidity , it is use for initializing state variable inside a contract. In a contract you can only have a single constructor and even in a situation whereby a constructor is not added to a contract it is being added by default.

A constructor is being created with the syntax below.

How to initialize a state variable with Constructor

State variables can be initialized by a constructor using the following steps :

(1) declare the constructor keyword

(2) open a parenthesis and pass an argument based on the data types of the state variable

(3) Set the scope of the constructor (this can either be public or internal)

(4) open a curly brackets to assign the state variable to the arguments of the constructor

This is a simple step on how to initialize a state variable using constructor , so whatever value that is input inside the constructor argument is the value of the state variable.

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