Apple numbers User Manual

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Chapter 12
    Dictionary of Functions 
 
EXACT
The EXACT function returns TRUE if the argument strings are identical in case and 
characters.
EXACT(string1string2)
 string1:  A text expression. To include the string as the argument, place quotation 
marks around it.
 string2:  The second text expression.
  
EXP
The EXP function calculates e to the power of a number.
EXP(number)
 number:  The power to which you want to raise e. It can be a number, a numeric 
expression, or a reference to a cell containing a numeric expression.
  
FACT
The FACT function calculates the factorial of a nonnegative number.
FACT(number)
 number:  A nonnegative number.
Notes
Any fractional part of number is truncated before the calculation.
  
Examples
EXACT("toledo", "toledo") returns TRUE.
EXACT("Toledo", "toledo") returns FALSE.
EXACT(toledo", "tol" & "edo") returns TRUE.
Examples
EXP(1) returns 2.71828182845905, an approximation of e.
EXP(LN(5)) returns 5. EXP is the inverse of the LN function.
Examples
FACT(5) returns 120, or 1 * 2 * 3 * 4 * 5.
FACT(0) returns 1.
FACT(4.5) returns 24. The fraction is dropped and 4! computed.
FACT(-1) returns an error; the number must be nonnegative.