A variable is a piece of data that you can alter that has also been given a name.
Many software applications such as spreadsheets and databases make use of variables. All computer programming languages can handle variables.
myname = "Henry"
The variable is 'myname' and its value is 'Henry'. Variables can hold any type of data. For instance a variable can represent a number
cost = 15
Variables are used instead of the value itself because it makes it easier for someone to understand what you are trying to do. For instance a formula such as this:-
total_cost = cost + tax
Makes more sense than
total_cost = 15 + 3
Challenge see if you can find out one extra fact on this topic that we haven't already told you
Click on this link: Variable