The validnumber( function checks to see if a numeric value is valid.
Parameters
This function has one parameter:
value – floating point value or expression
Description
This function checks to see if a value is a valid number. What is an invalid number, you ask? Some examples would include anything divided by zero or the square root of a negative number.
validnumber(5/2) ☞ true
validnumber(5/0) ☞ false
validnumber(sqr(8)) ☞ true
validnumber(sqr(-8)) ☞ false
Note: The nan( function (short for not a number) is the opposite of validnumber(, it returns false if the value is valid, true if it is invalid.
See Also
History
Version | Status | Notes |
10.0 | New | New in this version |