SyntaxForm is an option for InterpretationBox and TagBox objects that specifies the precedence level to use when the InterpretationBox or TagBox is considered as an operator.

ValueQ[expr] gives True if a value has been defined for expr, and gives False otherwise.

$Pre is a global variable whose value, if set, is applied to every input expression.

$PrePrint is a global variable whose value, if set, is applied to every expression before it is printed.

$PreRead is a global variable whose value, if set, is applied to the text or box form of every input expression before it is fed to Mathematica.

There are many ways to use symbols in Mathematica. Here we use symbols as 'tags' for different types of objects. Working with physical units gives one simple example. When ...

The aim of these tutorials is to provide a self-contained working guide for solving different types of problems with DSolve. The first step in using DSolve is to set up the ...

ReinstallJava[] is a convenience function that calls UninstallJava followed by InstallJava.

UseFrontEnd[expr] evaluates expr in an environment where the kernel can make use of the services of the notebook front end.

FixCRLF["str"] changes the linefeeds in the given string to the CR/LF Windows convention.