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.
In this article we will learn how to specified number, if a cell contains certain text. We will use the combination of IF, ISNUMBER and SEARCH functions in Microsoft Excel. Letâs understand with a simple exercise how we can specify the text in a cell based on the text in another cell. We have 2 numbers in the range A2:A4.