what is var called in javascript code example

Example 1: javascript declare a variable

//choose the best for your solution
var myVariable = 22; //this can be a string or number. var is globally defined

let myVariable = 22; //this can be a string or number. let is block scoped

const myVariable = 22; //this can be a string or number. const is block scoped and can't be reassigned

Example 2: js what does var mean

Used to create a variable that is globally scoped when not used in a function. 
When it is used in a function, it can only be used in that function and not
outside of it. This statement is comparable to let but more globalized.