Casio fx-115ES - Manual (Page 32)

E-30
k Other Functions
This section explains how to use the functions shown below.
!, Abs(, Ran#, n P r , n C r , Rnd(
Factorial (!)
This function obtains the factorials of a value that is zero or a positive
integer.
Appendix <#031> (5 + 3)! = 40320
Absolute Value Calculation (Abs)
When you are performing a real number calculation, this function
simply obtains the absolute value.
Appendix <#032> Abs (2 – 7) = 5
Random Number (Ran#)
This function generates a 3-digit pseudo random number that is less
than 1.
Appendix
<#033> Generate three 3-digit random numbers.
The random 3 digit decimal values are converted to 3-digit
integer values by multiplying by 1000.
Note that the values shown here are examples only. Values
actually generated by your calculator will be different.
Permutation ( n Pr) and Combination (nCr)
These functions make it possible to perform permutation and
combination calculations.
n and r must be integers in the range of 0 < r < n < 1
× 10 10
.
Appendix
<#034> How many four-person permutations and combinations are
possible for a group of 10 people?
Rounding Function (Rnd)
This function rounds the value or the result of the expression in the
function’s argument to the number of significant digits specified by
the number of display digits setting.
Display Digits Setting: Norm1 or Norm2
The mantissa is rounded to 10 digits.