Nasal Hello World: Difference between revisions

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<syntaxhighlight lang="nasal">
<syntaxhighlight lang="nasal">
gui.popupTip("Hello, World!");
gui.popupTip("Hello, World!");
</syntaxhighlight>
To use a [[Canvas]] GUI dialog, try the following:
<syntaxhighlight lang="nasal">
# create a new InputDialog with a title, label, and a callback
canvas.InputDialog.getText("Hello World", "Please enter your name", func(btn,value) {
    if (value) gui.popupTip("You entered: "~value);
});
</syntaxhighlight>
</syntaxhighlight>



Latest revision as of 15:41, 12 January 2020


In the programming world, a "Hello, World!" program This is a link to a Wikipedia article is used to illustrate basic syntax using a very simple program. The "Hello, World!" program in Nasal would look like this (run this in the Nasal Console):

print("Hello, World!");

This will print the string Hello, World! into the console.

To show a message inside the FlightGear window using a GUI tooltip instead, use the following snippet:

gui.popupTip("Hello, World!");

To use a Canvas GUI dialog, try the following:


# create a new InputDialog with a title, label, and a callback
canvas.InputDialog.getText("Hello World", "Please enter your name", func(btn,value) {
    if (value) gui.popupTip("You entered: "~value);
});