Calculate the factorial of a non-negative integer

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Reference no: EM132217541

What is wrong with the following method for calculating factorials?

Calculates the factorial of a non-negative integer, that is, the product of * all integers between 1 and the given integer, inclusive.

The worstTime(n) is O(n), where n is the given integer.

@param n the non-negative integer whose factorial is calculated.

@return the factorial of n.

@throws IllegalArgumentException if n is less than 0.

public static long factorial (int n) {

if (n < 0)
throw new IllegalArgumentException( );

if (n <= 1) return 1;

return fact (n+1) / (n+1); } // fact

Reference no: EM132217541

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