65 lines
1.2 KiB
Markdown
65 lines
1.2 KiB
Markdown
# Input & Output
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At the end of the day, a program takes some input,
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and transform it to some output. We will explore how to
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receive data, and also present it.
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## Output
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There are many ways to show the result of our programs.
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One of them is called `standard output`, which in simplified
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terms, is the terminal from where we run our program.
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### `print`
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Create an empty file, and name it `hello.php`. We will create
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a program that shows a result to our screen.
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Inside `hello.php` write the following code:
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```thp
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print("Hello")
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```
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Then, open a terminal and run the program with the `thp` command.
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After you press ENTER, you will see in the terminal the text "Hello".
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```sh
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$ thp hello.thp # Copy this command and run it
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Hello # This is the output of our program
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```
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The thp function `print` allows us to display something in the terminal.
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If you change the `hello.php` file, and run it, you'll see how it changes.
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```thp
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print(322)
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```
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```sh
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$ thp hello.php
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322
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```
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Or, if you copy `print` multiple times, each will show something in the screen.
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```thp
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print("Hello")
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print("This is an example")
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print("of having many prints")
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```
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```sh
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$ thp hello.php
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Hello
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This is an example
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of having many prints
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```
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### Using `print` in a larger program
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