The absolute value symbol is a pair of vertical bars wrapped around a value, like |x| or |-5|. The bar itself already sits on your keyboard: press Shift + \ (the backslash key, usually just above Enter). It works the same on Windows, Mac, and Chromebook. Type one bar before your number and one after. … Read more
The power of symbol, the superscript n in xn, is ⁿ (Unicode U+207F). There’s no standard Windows Alt code for it, so the fastest routes are to copy it from the button below or, in Word, type 207F and press Alt+X. On Mac, open the Character Viewer with Ctrl+Cmd+Space and search “superscript n. “ In … Read more
The summation symbol is ∑. On a Mac, press Option+W. On Windows there’s no standard Alt code for it, so the reliable routes are typing 2211 in Word and pressing Alt+X, or =UNICHAR(8721) in Excel. Its Unicode name is N-ARY SUMMATION (U+2211), and the LaTeX command is \sum. Pick your app below. The one thing … Read more
The for all symbol is ∀, Unicode U+2200. In Microsoft Word, type 2200 and press Alt+X. In Excel, put =UNICHAR(8704) in a cell. There is no classic Windows Alt code for it, so in most other apps you either paste it or use 2200 then Alt+X in Word where Unicode input is supported. Quick reference … Read more
The there exists symbol is ∃. Windows has no standard Alt code for it, so the reliable route in Word is to type 2203 and press Alt+X. On Mac, open the Character Viewer with Ctrl+Cmd+Space and search “there exists. ” Everywhere else, copy it below and paste. This is the existential quantifier from predicate logic, … Read more
The nabla symbol is ∇. It has no standard Windows Alt code, so the quickest route depends on your app: in Microsoft Word, type 2207 and press Alt+X; on a Mac, open Character Viewer with Ctrl+Cmd+Space and search for nabla. Everywhere else, click the button below to copy it. Nabla symbol quick reference Method Input … Read more
The integral symbol is ∫. On a Mac, press Option+B in almost any app. Windows has no standard Alt code for it, so in Word you type 222B and press Alt+X, and in other Unicode-aware apps 222B then Alt+X in Word works on the numeric keypad. Every route produces the same character, U+222B. Integral symbol … Read more
The proportional to symbol is ∝. Windows has no standard Alt code for it, so in Word type 221D and press Alt+X. In Unicode-aware apps you can hold Alt and type 8733 on the numeric keypad. On Mac, open the Character Viewer with Ctrl+Cmd+Space and search for proportional. The symbol’s official Unicode name is PROPORTIONAL … Read more
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