Probability Symbols: Symbols, Meanings, LaTeX and Unicode

Probability notation describes uncertainty, events, and relationships between random outcomes.

Symbol	Name and semantic role	LaTeX	Unicode	Action
∩	IntersectionAn operator, relation, connective, or notation mark whose meaning depends on its operands and context.	`\cap`	`U+2229`
∪	UnionAn operator, relation, connective, or notation mark whose meaning depends on its operands and context.	`\cup`	`U+222A`

Symbol

Name and semantic role

LaTeX

Unicode

Action

∩

IntersectionAn operator, relation, connective, or notation mark whose meaning depends on its operands and context.

\cap

U+2229

∪

UnionAn operator, relation, connective, or notation mark whose meaning depends on its operands and context.

\cup

U+222A

Symbol	Name and semantic role	LaTeX	Unicode
ℙ	Blackboard Bold PA letter-like symbol used to name a variable, function, space, transform, or other mathematical object.	`\mathbb{P}`	`U+2119`
\|	Conditional Probability BarAn operator, relation, connective, or notation mark whose meaning depends on its operands and context.	`\mid`	`U+007C`
E	Expected ValueAn operator, relation, connective, or notation mark whose meaning depends on its operands and context.	`\mathbb{E}`	`U+0045`
!	FactorialAn operator, relation, connective, or notation mark whose meaning depends on its operands and context.	`!`	`U+0021`
P	ProbabilityAn operator, relation, connective, or notation mark whose meaning depends on its operands and context.	`P`	`U+0050`

Symbol

Name and semantic role

LaTeX

Unicode

Action

ℙ

Blackboard Bold PA letter-like symbol used to name a variable, function, space, transform, or other mathematical object.

\mathbb{P}

U+2119

Conditional Probability BarAn operator, relation, connective, or notation mark whose meaning depends on its operands and context.

\mid

U+007C

Expected ValueAn operator, relation, connective, or notation mark whose meaning depends on its operands and context.

\mathbb{E}

U+0045

FactorialAn operator, relation, connective, or notation mark whose meaning depends on its operands and context.

!

U+0021

ProbabilityAn operator, relation, connective, or notation mark whose meaning depends on its operands and context.

P

U+0050

Verified notation examples

∩A\cap B

∪A\cup B

Frequently asked questions

How do I copy a probability symbols symbol?

Use the Copy button in the table, then verify the Unicode code point if the destination can substitute look-alike characters.

When should I use LaTeX or MathML instead?

Use LaTeX for editable equations and MathML for semantic web mathematics. Plain Unicode is best for short text where the destination preserves the exact code point.