# Operator-Input Form for Lists?

The documentation on Operator-Input Forms shows the following example

which suggests that there is an alternative, convenient, operator-style, tidy technique for inputting lists. However, there is not enough clarity in the example to determine what that technique or operator might be. I tried e11Spacee12 and e11Tabe12, but they both result in Times[e1,e2], somewhat predictably, since space normally denotes multiplication in Mathematica notebooks.

Any ideas whether there is an operator form for inputting lists? What does the documentation mean in this case?

• Related: (761). This Q&A may also be of interest: (17004) – Mr.Wizard Jul 27 '14 at 16:41

• @Reb.Cabin I'd personally stay away from using this for anything other than matrix input... using this form for lists will only lead to confusion (as you mentioned in the question, it could be misread as Times). – rm -rf Jul 27 '14 at 16:44