Function reference · Math
factorial
Computes the factorial of an expression.
Non-negative integers are evaluated exactly. Supported half-integers are reduced to closed forms involving sqrt(pi), and non-integer numerical evaluation can use the gamma function.
The compatibility spelling fact is an alias of factorial.
Examples
These examples use Nerdamer Notation.
Evaluate an integer factorial exactly.
factorial(5) // → 120
Reduce a half-integer factorial symbolically.
factorial(1/2) // → (1/2)*pi^(1/2)
Interfaces
The same operation is available through the interfaces below.
Nerdamer Notation
Use this form inside input passed to nerdamer(...).
factorial(arg1)nerdamer.factorial
Call the operation through the default nerdamer import.
nerdamer.factorial(x: Expression): ExpressionParameters
| Name | Type | Description |
|---|---|---|
x | Expression | The expression to compute the factorial of. |
Returns
Expression — The factorial of `x`.
Aliases
fact