To follow this tutorial series, just copy the code into your FreeBASIC IDE and test it out.
end
end shuts the game down.
sleep
end
sleep pauses the game and waits for the user to press a key.
print "something"
sleep
end
This will display something to the screen using print
print 43
print "text"
sleep
end
Text has to be enclosed in quotes. Numbers do not. Lines of text are known as strings.
print 4 + 2
print 4 - 2
print 4 * 2
print 4 / 2
sleep
end
You can perform math on numbers using mathematical operators.
- The plus sign ( + ) is for addition
- The minus sign ( - ) is for subtraction
- The asterisk ( * ) is for multiplication
- The slash ( / ) is for division
print "10" + 10
sleep
end
You cannot perform math on strings, only numbers. Note that numbers inside strings count as strings, not numbers.
print "Part 1 " + "Part 2"
print "Part 3 " & "Part 4"
sleep
end
However, you can join together strings with the plus sign ( + ) or the and sign ( & ).
print "The number is" ; 10
sleep
end
You can print out multiple chunks of data on the same line using a semicolon.
print "The number is" ; 10
print "The number is" ;
print 20
sleep
end
If a print statement ends in a semicolon, whatever is displayed by the next print statement will appear on the same line.
someNumber = 10
print someNumber
sleep
end
Variables store data while the game is running.
someNumber = 10
print someNumber
someNumber = 20
print someNumber
sleep
end
The value contained by the variable can be changed at any time.
someString$ = "This is text."
someNumber = 30
print someString$
print someNumber
sleep
end
The names of variables that contain strings end in a dollar sign ( $ ). Variables that contain integers (whole numbers) do not require a special ending.
someFloat# = 1.01
print someFloat#
sleep
end
The names of variables that contain floating point numbers (numbers with decimal points) end with the pound sign ( # )
if 2 + 2 = 4 then print "2 + 2 does equal 4!"
sleep
end
An if statement will execute the code after then if the expression after if is true.
if "someString" = 5 then
print "This is never seen because of errors"
end if
sleep
end
You cannot compare a number and a string in an if statement.
for i = 1 to 10
print i
next i
sleep
end
The for-next loop will repeat a block of code a certain number of times.
for i = 1 to 10 step 2
print i
next i
sleep
end
If you add step to a for-next loop, it will skip numbers equal to the number after step.
for i = 10 to 1
print i
next i
sleep
end
Putting a larger number first will not make a for-next loop count backwards.
for i = 10 to 1 step -1
print i
next i
sleep
end
To make a for loop count backwards, you have to make it count backwards.
for i = 1 to 100
if i = 50 then exit for
print i
next i
print "loop over"
sleep
end
exit for will cause the for loop to end and start at the code after it.
