This built-in function returns a value indicating whether or not a variable can be converted to a numeric data type. The argument value can be any string expression. The IsNumeric function returns True if the expression can legally be converted to a number; otherwise, it returns False. Expressions that can legally be converted to a numeric data type include numeric and string data.

# This function call returns a True if Field1 is numeric and False if Field1 is not

# numeric. If it is True, Field1 is assigned to Field2.