Documentation/How Tos/Calc: ISNONTEXT function
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ISNONTEXT
Tests if a cell contains no text.
Syntax:
ISNONTEXT(value)
- Returns TRUE unless value is or refers to text, in which case it returns FALSE.
 - ISNONTEXT(value) is equivalent to NOT(ISTEXT(value)).
 
Example:
ISNONTEXT(123)
- returns TRUE.
 
ISNONTEXT(C2)
- where cell C2 contains cat, returns FALSE.
 
ISNONTEXT(C3)
- where cell C3 contains =1/0, returns TRUE, because =1/0 returns an error value, not text.
 
ISNONTEXT(C4)
- where C4 is an empty cell, returns TRUE (an empty cell contains no text).
 
See also:
ISTEXT function, ISNUMBER function, ISBLANK function, ISERROR function, ISLOGICAL function, ISFORMULA function