[Solved] Called function doesn't print argument

[luofeiyu]

The function have no value to return ,it print argument.

Code: Select all

function myprint(ostring)
    print  ostring
end function

Call the function in the main sub:

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sub main
   myprint(ostring="welcome")
end sub

Why it print "False" ,instead of "welcome"?

[robleyd]

Wrong syntax. Read documentation. https://help.libreoffice.org/latest/en- ... 20300.html

[Zizi64]

You need pass only the value (the string). Do not pass the name of the variable.

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sub main
   myprint("welcome")
end sub

The ostring is a local variable in your function.

[robleyd]

You might also want to learn about the differences between subroutines and functions; particularly that functions return a value.

[JeJe]

Because ostring="welcome" is false so you're passing false

( ostring="welcome" is evaluated and as ostring is an undeclared variable the expression is evaluated as false)

[JeJe]

Code: Select all

Sub Main
ostring="welcome" 'declaring it first works
myprint ostring
myprint ostring="welcome" 'then this is true
End Sub

function myprint(ostring)
    print  ostring
end function

[JeJe]

What you're trying to do, which you can do in other languages, is assign a value when you declare a variable. You can't do that in Basic - except by being lax and not using dim at all. This gives an error, can't do it in Basic:

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dim ostring="welcome"