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The exclamation point is the symbol for the factorial function. For integer values of n, n! = 1*2*3*...*n The factorial is critical for calculating numbers of permutations and combinations.
Some for design, some for the year they founded, etc.
Do you mean n! then if so it stands for "n factorial" which means a given number is to be multiplied each time from itself to one. Examples: 3! = 3*2*1 = 6 4! = 4*3*2*1 = 24 6! = 6*5*4*3*2*1 = 720 Some calculators have a factorial key that can perform these calculations.
What are some experimental design flaws that may explain why you don't get 100% yieldin the balloon lad