This function tests whether a value, an expression, or contents of a referenced cell has numeric data.

Syntax

ISNUMBER(cellreference)

ISNUMBER(value)

ISNUMBER(expression)

Arguments

Specify a cell reference, a numeric or text value, or an expression for the argument.

Remarks

Use this function to test the contents of a cell, a numeric or text value directly, or a function or expression.

This function returns TRUE if the argument is or refers to a number, and returns FALSE if the argument is or refers to a value that is not a number. This function returns FALSE if the value is or refers to a cell with no data.

You might want to use this function to test whether cells contain numeric data before you perform mathematical operations on them, such as averaging the contents of a range of cells.

Data Types

Accepts any data type for an argument. Returns Boolean (TRUE or FALSE) data.

Examples

ISNUMBER(B3)

ISNUMBER(R1C2)

ISNUMBER(12) gives the result TRUE