The word "variable" represents an unknown number.
The letter that represent the composite number is letter C.
An unknown number represented by a letter or symbol is a variable.
A variable is assigned to represent an unknown quantity.
variable
b
a variable.
An unknown variable
The word "variable" represents an unknown number.
The letter that represent the composite number is letter C.
mnemonic * * * * * A variable
VARIABLE
An unknown number represented by a letter or symbol is a variable.
A letter used to represent a number is a variable of sometimes a constant.
If you are talking about math then its usually " x " but if that is already use in the expression and you want to use another symbol to represent a DIFFERENT number then you can use y or a or so on.
variable
Any letter that you like. And it need not be a Greek letter. In fact, it need not even be a letter.