The American Optometric Association suggests that children should have their first regular eye exam at six months of age. Another vision exam should take place when a child is around two or three years of age when their vision undergoes its most rapid development and vision correction is most effective.
The ISNUMBER function is a quick, easy way to check if a cell contains a number. Our example used the IF function to illustrate how ISNUMBER can be used. If you haven't used IF in a formula before, you can read our lesson on the IF function here.
You can use the GetCellValue method to retrieve the value of a cell in a workbook. The method requires the following three parameters: A string that contains the name of the document to examine. A string that contains the name of the sheet to examine.A string that contains the cell address (such as A1, B12) from which to retrieve a value. The method returns the value of the specified cell, if it could be found. The following code example shows the method signature. string that contains the name of the sheet to examine. A string that contains the cell address (such as A1, B12) from which to retrieve a value. The method returns the value of the specified cell, if it could be found.