Which of the following is the best variable formal to store a customer's age using the least possible amount of storage data?

Int (integer) is the most efficient data type for storing a customer's age, as age is typically a whole number without decimal points. Integers generally require less memory than floating-point types, ensuring minimal storage consumption for this type of data.

Float is a floating-point data type used for numbers with decimal points, which is unnecessary for age and consumes more memory than an integer.

Char is used to store single characters and would be highly inefficient and inappropriate for storing a numerical age value.

Double is a double-precision floating-point data type, which uses even more memory than Float and is also unsuitable for whole numbers like age.