# Use shorter notation to work with units?

Posted 2 years ago
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 Hi allThis works as expected: in: Quantity[18, "Meters"] + Quantity[12,"cm"] out: Quantity[1812, "Centimeters"] However, I'd prefer a shorter notation like this, which also works as expected: in: 18 meters + 20 meters out: 38 meters But the following does not work as expected: in: 18 meters + 20 centimeters out: 20 centimeters + 18 meters Any suggestions?Thanks!
 Hi Sascha,You may want to take a quick look at my post to this discussion that shows how unit discovery can be used to create shorthand notation fairly painlessly . For example, you could use ctrl+= to define meters and centimeters or just do it by hand like so m = Quantity[1, "Meters"]; cm = m /100; 18 m + 20 cm // N (* Quantity[18.2, "Meters"] *)