PetitBasic Manual

Introduction

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean scelerisque tellus metus, vel consectetur lacus suscipit eu. Aliquam sed sodales nisi. Nunc laoreet finibus neque, ac faucibus justo consectetur vitae. Ut maximus metus ac dictum varius. Nam suscipit eros vitae nibh lobortis, eget lobortis metus porta. Ut sed vehicula tortor. Vestibulum id feugiat lectus. Vivamus eu placerat leo. Sed accumsan auctor nisi. Pellentesque vitae tortor hendrerit, faucibus nunc nec, venenatis massa. Cras vehicula eros lectus, et sodales erat interdum in. Phasellus tristique ipsum eget lacus congue fermentum. Aenean lorem mi, imperdiet vitae ullamcorper ut, luctus a magna. Pellentesque volutpat ex quis ex vehicula, sed gravida risus tempor. Proin commodo orci eu pellentesque condimentum.

Conditional Structures

IF block

Conditional structures represent a set of commands which will be executed when a certain condition is validated.

on PetitBasic, they appears as IF blocks. These blocks have at least two commands : if and ifend.

if [condition]
[commands]
ifend

You can also add two optionnal commands : elseif and else.

if [condition]
[commands]
elseif [condition]
[commands]
else
[commands]
ifend

You can add any number of elseif, the same way you can nest IF blocks onto another IF blocks.

Conditions

PetitBasic handles conditions simply : if the expression is equal to 1 or "true" (note that he accepts strings "true" and "false"), it'll be considered as validated.

Let's see now condition's operators : here's the basics operators : =, <, >, <=, >= and <>.

You'll easily recognize some of these, and for some precision <> means inequality.

Add to this some boolean operators, "And", "Or" and "Not".

Loops

FOR loops

FOR loops are loops (obviously) who execute code a defined number of times.

Here's the PetitBasic Syntax :

for [variable] = [begin] to [end] {step [step]}
[commands]
next

All commands in the FOR loop will be executed while the value of variable hasn't reached the end value. The variable will be automatically incremented by one at each loop. This value can be changed if you have specified a step.

WHILE loops

WHILE loops, are loops whose number of iterations is not determined in advance.

while [condition]
[commands]
wend

While the condition is true, we'll run code indefinitely inside of it. If the condition is false before enter the loop, we'll ignore it without entering.

Subs

Subs are groups of code lines that can be called anywhere in your program. Here's the PetitBasic syntax :

sub [sub name]
[commands]
subend

Commands in the sub will not be executed : you need to call it in your main program if you want to execute it. You can create subs anywhere in your program, but you should put them at the beginning and the end of your main program.

When you want to execute your sub, you can call it with the GOSUB command :

gosub [sub name]

Keep in mind that subs and main program's variables are the same.

System's Variables and Commands

Functions

Commands

Seach Functions, System's Variables or Commands

If you want more details about an element, click on the corresponding line.