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Friday, April 1, 2011

# Find the number of digits in n!.

number of digits in n = floor(log(n)) + 1;

so for n! # of digits = (floor(log(n!)))+1;
= floor(Sum of log1+log2+--- + logn)+1;

digits = (int) log10(number), where log 10 means log for base 10

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