A specific factor having a range of possible values is a variable.
A variable is any characteristics, number, or amount which could be measured or counted. A variable may be referred to as a data item. Age, sex, business financial gain and expenses, country of birth, cost, category grades, eye color and vehicle are some unit samples of variables.Five types of variables are categorical, nominal, ordinal, numeric and discrete variables.
The possible values of the variable are domain. They are numerical symbols that could be used to represent any number. For example , 'I am 18 years old' , here 18 is a variable.
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