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  1. Factorial - Wikipedia

    Factorials have been discovered in several ancient cultures, notably in Indian mathematics in the canonical works of Jain literature, and by Jewish mystics in the Talmudic book Sefer Yetzirah.

  2. Factorial Function - Math is Fun

    The factorial function (symbol: !) says to multiply all whole numbers from our chosen number down to 1. We usually say (for example) 4! as "4 factorial", but some people say "4 shriek" or "4 bang". Each …

  3. The Factorial (!) in Mathematics and Statistics - ThoughtCo

    May 14, 2025 · A factorial is multiplying a number by all whole numbers less than it down to one. Factorials are useful in math areas like combinatorics and probability calculus, where multiplying …

  4. Factorial Function - Symbol, Formula, Properties, & Examples

    Mar 7, 2025 · What is a factorial in mathematics. Know its symbol, equation, rules, and properties. How to solve it. The factorial of 0, negative numbers, and decimals with examples.

  5. The Factorial Function

    The factorial function is a mathematical formula represented by an exclamation mark "!". In the Factorial formula, you must multiply all the integers and positives that exist between the number that appears …

  6. Factorial | Definition, Symbol, & Facts | Britannica

    Factorial, in mathematics, the product of all positive integers less than or equal to a given positive integer and denoted by that integer and an exclamation point.

  7. What are factorials, and how do they work? | Purplemath

    The factorial of a whole number n, denoted as n!, is the product of all the whole numbers between 1 and n: 1×2×3×…× (n−1)×n. So 3! would be 1×2×3 = 6.

  8. Factorial in Maths - GeeksforGeeks

    4 days ago · The factorial of a number is the product of all positive integers from that number down to 1. It plays a key role in many mathematical concepts, such as permutations, combinations, probability, …

  9. Factorial - from Wolfram MathWorld

    The factorial n! is defined for a positive integer n as n!=n (n-1)...2·1. (1) So, for example, 4!=4·3·2·1=24. The notation n! was introduced by Christian Kramp (Kramp 1808; Cajori 1993, p. 72).

  10. Factorial - Algebrica

    Nov 30, 2025 · Factorial, denoted as n!, represents the product of all positive integers less than or equal to a non-negative integer, n. In simpler terms, given a non-negative integer, the factorial of that …