# what does ! mean in math

## Question: what does! mean in math?

## Answer: n Mathematics ! is the factorial sign.

## Explanation:

If n is an natural number greater than or equal to 1, then

n! read as (n factorial) = n × (n-1) × (n-2) × (n-3) × ... × 3 × 2 × 1

example 5! = 5 ×4 × 3 × 2 × 1 = 120

### Thus, In Mathematics ! is the factorial sign.

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