This is documentation for Mathematica 7, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.1)


is a global variable which, if set, is applied to any input string that is found to contain a syntax error.
  • The arguments given to $SyntaxHandler are the complete input string and an integer specifying the character position at which the syntax error was detected.
  • The first character in the string is taken to have position 1.
  • Any string returned by $SyntaxHandler is used as a new version of the input string, and is fed to Mathematica. If the string does not end with a newline, Mathematica waits for input to complete the line.
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