### What are Constants?

Constants are created just like the `var` and `let`. We use the `const` keyword for initializing constants, for example.

Variables declared with `const` are very much similar to the variables declared with the `let` keyword, but the only difference is that we cannot reassign values to the variables declared with the `const` keyword.

const  PI = 3.141592653589793;
PI = 3.14; // error
console.log(PI);

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The syntax of the JavaScript programming language is the set of rules that defines how a JavaScript program will be written and interpreted (by both the runtime system and by human readers).

JavaScript is dynamically typed (also called loosely typed) scripting language. That is, in javascript variables can receive different data types over time. Datatypes are basically typed of data that can be used and manipulated in a program.

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What are Constants?

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