Convert a string to upper case in BASIC?

[presuminged]

Can this be done?

[Ralf]

There isn't any ready function like ToUpper to do it, I believe.

You can make it with your own code however. Loop through all characters in the string, check their ASCII value and if it is a lowercase letter change it to uppercase.

[g0blinish]

I bet it needs to improvement:

Code: Select all

  10 INPUT ">";A$
  11 LET b$=""
  20 FOR i=1 TO LEN (a$)
  21 LET b=CODE (a$(i))
  22 IF b>=97 AND b<=122 THEN LET b=b-32
  23 LET b$=b$+CHR$ (b-32)
  29 NEXT i
  30 PRINT b$

[jpnz]

You could use a function - have a look at this article

[presuminged]

Thanks for the replies!