Authored by Nonki Takahashi
Introduction
Today, I'd like to write about condition in Small Basic. I hope this information make you understand Small Basic deeply.
What is Conditon?
In Small Basic, there are two pattern to use conditon as follows.
If condition Then
statements
EndIf
While condition
statements
EndWhile
Types of Condition
There are following three types of condition in Small Basic.
- comparison expression (ex. a < b)
- logical expression (ex. clicked And moved)
- logical value (ex. "True")
Comparison Expression
There are follwing six comparison operators in Small Basic.
- = equal to
- < less than
- <= less than or equal to
- > greater than
- >= greater than or equal to
- <> not equal to
Equal to and not equal to are used for text also. But other operators are for numbers. If you compare two texts with operators including less or greater, the texts are converted to number zeroes before comparison. So you can't compare such like "ant" > "apple". To compare order for texts, you should create a subroutine.
Logical Expression
There are following two logical operators in Small Basic.
- And
- Or
Small Basic doesn't have Not operator. Following code is my alternate solution.
Not = "True=False;False=True;"
While Not[keydown]
Program.Delay(200)
EndWhile
Logical Value
There are following two logical values in Small Basic.
- "True"
- "False"
These texts are not case-sensitive. So you can write "TRUE" or "false" for the same purpose. Actually, Small Basic checks whether the logical value is "True" or not.
