The syntax of the Wolfram Language is unique among modern languages in allowing not just ordinary ASCII characters, but also a variety of special characters that greatly increase readability and elegance, as well as correspondence with traditional mathematical notation.

Arithmetic & Functions

× \[Times] — multiplication sign, automatically added between numbers etc.

÷ \[Divide]   ▪ √ \[Sqrt]   ▪  \[Piecewise]   ▪ ⌊ \[LeftFloor]   ▪ ⌋   ▪ ⌈   ▪ ⌉

Comparisons

≠ , ≤ , ≥ ,  — automatically converted from !=, <=, >=, ==

 \[LongEqual] — alternative form equivalent to ==

Constants

∞ \[Infinity]   ▪ π \[Pi]   ▪  \[ExponentialE]   ▪  \[ImaginaryI]   ▪ ° \[Degree]

Calculus, etc.

∂ \[PartialD]   ▪ ∫ \[Integral]   ▪  \[DifferentialD]   ▪ ∑ \[Sum]   ▪ ∏ \[Product]

 \[DifferenceDelta]   ▪  \[DiscreteRatio]   ▪  \[DiscreteShift]

Vectors & Matrices

 \[Cross]   ▪  \[Transpose]   ▪  \[Conjugate]   ▪    ▪ 

Logic

∧ \[And]   ▪ ∨ \[Or]   ▪ ¬ \[Not]   ▪ ⊻ \[Xor]   ▪ ⊼ \[Nand]   ▪ ⊽ \[Nor]

 \[Implies]   ▪ ⧦ \[Equivalent]

Sets, etc.

∈ \[Element]   ▪ ∋   ▪ ∉   ▪ ∀ \[ForAll]   ▪ ∃ \[Exists]

⋃ \[Union]   ▪ ⋂ \[Intersection]

 \[Distributed] — distributed according to a probability distribution

Graphs

 \[UndirectedEdge]   ▪  \[DirectedEdge]

Rules

 \[Rule] — automatically converted from ->

 \[RuleDelayed] — automatically converted from :>

Parts & Associations

...〚...〛 — part specification, entered using [[, ]]

<|…|> — association, automatically converted from <|...|>

Pure Functions

 \[Function] — pure function xbody, automatically converted from |->

Invisible Syntax »

\[InvisibleComma]   ▪ \[InvisibleTimes]   ▪ \[ImplicitPlus]

\[InvisibleApplication] — separate a function and its argument, as in fx

Operators without Built-in Meanings »

CirclePlus (⊕ )  ▪ Wedge (⋀ )  ▪ AngleBracket (〈〉 )  ▪ ...