ISERR Function (Functions in Excel)

Cell to test	Result
3	FALSE	=ISERR(D4)
#DIV/0!	TRUE	=ISERR(D5)
#NAME?	TRUE	=ISERR(D6)
#REF!	TRUE	=ISERR(D7)
#VALUE!	TRUE	=ISERR(D8)
#N/A	FALSE	=ISERR(D9)
#N/A	FALSE	=ISERR(D10)

What Does It Do ?

This function tests a cell and shows TRUE if there is an error value in the cell.

It will show FALSE if the contents of the cell calculate without an error, or if the error

is the #NA message.

Syntax

=ISERR(CellToTest)

The CellToTest can be a cell reference or a calculation.

Formatting

No special formatting is needed.

Example

The following tables were used by a publican to calculate the cost of a single bottle

of champagne, by dividing the cost of the crate by the quantity of bottles in the crate.

Table 1 shows what happens when the value zero 0 is entered as the number of bottles.

The #DIV/0 indicates that an attempt was made to divide by zero 0, which Excel does not do.

Table 1
	Cost Of Crate :	£24
	Bottles In Crate :	0
	Cost of single bottle :	#DIV/0!	=E32/E33

Table 2 shows how this error can be trapped by using the =ISERR() function.

Table 2
	Cost Of Crate :	£24
	Bottles In Crate :	0
	Cost of single bottle :	Try again!	=IF(ISERR(E40/E41),"Try again!",E40/E41)

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