Question

what is a variable? explain the rules of variable​

Answer 1

Answer:

A variable is the name given to the memory location. A variable name is an entity that points to a particular memory location. Rules for constructing variables in C A Variable name consists of any combination of alphabets, digits and underscores.

Explanation:

Answer 2

Explanation:  

A variable is a mathemetical expression expressed in words. Supposing, there is question: 2+x=  _________ and u dont know the answer because the x can be 3, 4, 5 or anything so instead of a number we write an alphebat which is not x because x is already used in the questions... you can write x if you want x to be 0. then it becomes 2+x= y. And, variables cant be used everywhere, they can only be used in alegebra.