Int (short for integer) is a data type that represents whole numbers without any decimal points. It includes both positive and negative numbers, as well as zero.
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Arithmetic operators are used to perform mathematical operations on integers and other numeric data types, such as addition (+), subtraction (-), multiplication (*), and division (/).
Casting: Casting refers to converting one data type into another. For example, casting an int to a float would change the representation of the number from a whole number to a decimal value.