Overview. For sensors like the VEX Ultrasonic sensor that return a range of values, we often simply want to check if the returned value is more than, equal to, or less than some value called a threshold. For example say that we have the sensor set up and are driving around, but we need to stay at least 5 inches (127 mm) away from any obstacles.
How do I tell excel to treat a  in an excel formula as a ? :) Excel reads quotation marks as signifying text inside, but my text field requires a  to be included in it as well, so I need to somehow tell Excel that the  is part of the text field within the two s :p. Does that make sense? Mike.
Prefix. If you enter the formula â2 + 2,â a worksheet displays the entry as a constant or label called â2 + 2â without further processing. To signal to the spreadsheet that youâre entering an equation that needs processing, you need a prefix before the formula.The most common prefix is an equal sign (=).ote that the formula prefix appears before the equation in that bar. To modify the formula, click the input cursor into the bar. Move the cursor with the mouse or keyboard arrows, delete mistakes with the Delete key or type in new parts to the formula.