WEBVTT

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Basic Input and Output

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In this video, we will understand the role of input and output in Java.

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Demonstrate basic input handling with the Use the Scanner class.

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Apply output statements with printing results and error messages.

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Write and run basic Java programs.

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In programming, it's not enough for a computer to just run calculations silently.

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It needs to communicate with us.

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That's where input and output comes in.

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Input means taking data from the user and output means showing results.

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This interaction makes our programs interactive and useful.

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In Java, system.in is used for input, system.out for output,

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and system.air for errors.

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Now we're going to learn how to take input, show output, and handle errors in Java.

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Let's start coding.

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To read input, we use the scanner class.

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First, we import it, then create a scanner object.

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Scanner can read numbers, text, and even bullions.

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When we run the program, the computer first asks us to enter the first number.

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Here, we typed five.

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Then it asks for the second number, and we type date.

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The program adds both numbers and displays.

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The sum is 13.

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Finally, the message process finished with exit code zero means the program ended successfully without errors.

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Now, continuing our coding practical session, sometimes users type the wrong input.

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If we ask for a number, but they type text, the program crashes.

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To avoid this, we can check with has next in, or use try catch to handle errors safely.