A-LevelComputer ScienceAlgorithmsMay/June 2022Paper 2 Q610 Marks
The factorial of a number is the product of all the integers from 1 to that number. For example: factorial of 5 is given by 1 × 2 × 3 × 4 × 5 = 120 factorial of 7 is given by 1 × 2 × 3 × 4 × 5 × 6 × 7 = 5040 factorial of 1 = 1 Note: factorial of 0 = 1 A function Factorial() will: • be called with an integer number as a parameter • calculate and return the factorial of the number • return -1 if the number is negative.
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