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global

global variableList

The global keyword makes a variable and its contents available to any handler in HyperCard. Changing the value of a global variable in any handler changes its value everywhere.

Note: You must use the global keyword in each handler to declare the global variables you want to use.

Global variables are not saved between sessions of HyperCard. Global variables are also lost under System 6's single Finder when a user (or handler) suspends HyperCard by launching another application with the open command.

Examples

global myVar

global pages,sections,chapters

Demo Script

on mouseUp

  global theName

  ask "What is your name?"

  if it is empty then exit mouseUp

  put it into theName

  answerReverseName

end mouseUp

on answerReverseName

  global theName

  repeat with i = the number of chars in theName down to 1

    put char i of theName after reverseName

  end repeat

  answer "Your name spelled backwards is" && reverseName & "."

  -- put empty into the global when you are done with it:

  put empty into theName

end answerReverseName

Placeholders

variableList

A comma-separated list of global variable names.

The actual names don’t matter as long as they’re not the same as one of HyperCard’s reserved words. (That is, don’t use result as a variable name.)

For example:

var1

var1,var2,var3, var4

fieldName, N, numberOfCharacters

HyperTalk Reference

exit

function

global

if (multiple-statement)

if (single-statement)

global

Examples

Demo Script

Related Topics

Placeholders

variableList