In programming the variable term is like a box that can hold inside any value of any type, this I mean that not necessarily the value that we keep in the box is numeric and math for example.
Basically when we talk about variables it is a container in which harbor a value or object to be used later, believe me it's quite useful for many things, but there is something we need to bear in mind when using our box, each box used for something else (I mean the kind of thing you keep in it) imagine in our home, we have many boxes but each has its purpose, for example jewels are stored can be in a safe or in a wooden box in the mirror of our mother, a shoebox is made of cardboard, to the point, each case has certain characteristics to save a specific object, you will not store water in a box of some shoes?
In programming we use boxes that help us to save the values that will work in our code, remember that there are several types of securities such as letters, words, integers, fractional numbers, a (true or false) boolean among others, then when using our box we must ensure that a type int (integer) the box must be used to store whole numbers and not for other data such as letters or words.
