Saif

The parallel lines symbol is ∥. In Microsoft Word, type 2225 and press Alt+X. In other Windows apps that accept Unicode input, hold Alt and type 8741 on the numeric keypad. On a Mac, open Character Viewer with Ctrl+Cmd+Space and search for “parallel to. ” There is no standard Windows Alt code for it. Quick … Read more

The does not divide symbol is ∤. In Microsoft Word, type 2224 and then press Alt+X. In Excel, enter =UNICHAR(8740) in a cell. Windows has no standard Alt code for this character, so in other programs you copy it or use Character Map. On a Mac, open the Character Viewer with Ctrl+Cmd+Space. Quick reference: every … Read more

The right angle symbol is ∟. It has no standard Windows Alt code, but in a Unicode-aware app you can hold Alt and type 8735 on the numeric keypad. On Mac, open the Character Viewer with Control+Command+Space and search for it. In Word, type 221F and press Alt+X, and in Excel or Google Sheets use … Read more

The angle symbol is ∠. Windows has no code for it in the standard character set, so the quickest reliable route is Word: type 2220, then press Alt+X. On a Mac, open the Character Viewer with Ctrl+Cmd+Space and search for “angle.” In every other app, copy the glyph below and paste it. Quick reference: every … Read more

The farad symbol is F, the plain capital letter, so press Shift+F on any keyboard. The unit only gets tricky with its micro prefix: microfarad is µF, and you type that µ with Alt+0181 on Windows or Option+M on Mac. Both work in Word and Excel, and the F itself needs nothing special. Because F … Read more

The not an element of symbol is ∉. Windows has no standard Alt code for it, so the fastest typed route is in Microsoft Word: type 2209 and press Alt+X. On a Mac, open the Character Viewer with Ctrl+Cmd+Space and search for “not an element of.” Everywhere else, copying it is quickest. Quick reference for … Read more

The square root symbol is √. In Microsoft Word, type 221A and then press Alt+X. On a Mac, press Option+V. Windows has no standard Alt code for this character, so use the emoji panel (Win+. ) or type 221A then Alt+X in Word in an app that reads Unicode. In Excel or Google Sheets, the … Read more

The cube root symbol is ∛. In Microsoft Word, type 221B and press Alt+X and it flips into the glyph. In Excel or Google Sheets, the formula =UNICHAR(8731) returns it. There is no standard Windows Alt code for the cube root symbol, so in most other apps the fastest move is to copy it and … Read more

The sigma symbol is Σ. On Windows, hold Alt and type 931 on the numeric keypad inside any Unicode-aware app; in Word, type 03A3 and press Alt+X. On Mac there is no Option shortcut, so open Character Viewer with Ctrl+Cmd+Space and search “sigma.” Both give the Greek capital letter sigma. Sigma has no code-page Alt … Read more

The theta symbol is θ. Windows has no standard Alt code for it, so the quickest routes are typing 03B8 in Word and pressing Alt+X, or 03B8 then Alt+X in Word on the numeric keypad in a Unicode-aware app. On a Mac, open the Character Viewer with Control+Command+Space and search for theta. Both give you … Read more