03 Input and Output
Let’s start with input and output operations
READING NUMBERS FROM THE KEYBOARD
Any information or data sent to a computer for processing is considered input. Input or user input is sent to a computer using an input device. The picture is an illustration of the difference between input and output.
An easy way to get data input into the program, is to create a Scanner object.
Data generated by a computer is referred to as output. This includes data produced at a software level, such as the result of a calculation, or at a physical level, such as a printed document.
A basic example of software output is a calculator program that produces the result of a mathematical operation.
TYPE CONVERSION RULE
- If one of the operands is double, the other is converted into double.
- Otherwise, if one of the operands is ﬂoat, the other is converted into ﬂoat.
- Otherwise, if one of the operands is long, the other is converted into long.
- Otherwise, both operands are converted into int.
Typecasting, or type conversion, is a method of changing an entity from one data type to another. It is used in computer programming to ensure variables are correctly processed by a function.
Thanks for reading so far. I will continue my Java journey in the next article.