Sigma sign Σ

Sigma sign Σ (type sum symbol on your keyboard)Signo de Sigma Σ (haz signo de sigma con el teclado)
Sigma sign

The sigma sign is known by most as a mathematical symbol that indicades the sum. Sigma Σ is one of the most popular mathematic signs which means a summation of something. Read this, and you will discover how to type it in by using different techniques depending on your Operating System and tastes.

Maths Σ
½π
Maths Emoji
Text symbols

What Sigma means

Sigma

The name of sigma, according to one theory, may continue that of Phoenician Samekh. According to a different theory, its original name may have been "San" , while "Sigma" was a Greek innovation that simply meant "hissing", based on a nominalization of a verb σίζω. Sigma is also used for the the summation operator, a class of baryons in particle physics, macroscopic cross sections in nuclear and particle physics, self-energy in condensed matter physics, the balance of the invoice classes and the overall amount of the debts and demands in economics, the set of symbols that form an alphabet in linguistics and computer science,etc. Read Wikipedia article on sum symbol to find out more about its meaning.


How to input sigma symbol

Choose your system and find out.

Windows

From Keyboard

Alt Codes

Shortcut technique that works on Desktops and most Laptops running MS Windows. You press Alt and, while holding it, type a code on Num Pad while it's turned on. Please, read a guide if you're running a laptop. You can type many frequently used symbols with this method.

Alt code Symbol
0228 Σ
Shift States

Configure your keyboard layout in Windows so that you can type all additional symbols you want as easy as any other text. Takes about 5-10 minutes to set things up, but you'll be typing like a boss. You can assign sigma symbol σ and any other text characters to your keyboard using this technique.

Character Map

CharMap allows you to view and use all characters and symbols available in all fonts (some examples of fonts are "Arial", "Times New Roman", "Webdings") installed on your computer. You can input sigma symbol using it.

Mac

Emoji on iOS (iPhone, iPad and iPod touch)

How to input Emoji on iOS iPhone, iPod & iPad (illustrated)
How to input Emoji on iOS iPhone, iPod & iPad Simple and beautiful way to discover how to add a virtual keyboard for Emoji symbols visible as small pictures. The keyboard itself is preinstalled on your iOS device, so you don't have to download, or buy anything.

Keyboard viewer

Mac keyboard viewer window

You can make frequently used technical non-fancy symbols like "√ ∑ π ∞ ∆ ™ © æ £ ¢" and åccénted letters on Mac using [Option] key. I've compiled a list of shortcuts in my article and explained how to open keyboard viewer. You can also use your Keyboard Viewer as an alternative to my list.

[Option] + [S] produces Σ sigma sign.


Character Palette

Character Palette allows you to view and use all characters and symbols, including sigma, available in all fonts (some examples of fonts are "Arial", "Times New Roman", "Webdings") installed on your computer.


Linux

From Keyboard

Unicode hex code Symbol Compose key sequence Symbol
03A3 Σ *S Σ

There actually are 3 different ways to type symbols on Linux with a keyboard. And all of them can produce sigma text symbol.

Character map

Character map allows you to view and use all characters and symbols available in all fonts (some examples of fonts are "Arial", "Times New Roman", "Webdings") installed on your computer. It can also help you lookup Unicode codes for entering symbols with keyboard.

HTML code

Following is a list of HTML and JavaScript entities for sigma symbol. In Javascript you should write like a = "this \u2669 symbol" if you want to include a special symbol in a string.

HTML entity JS entity Symbol
Σ \u03A3 Σ


Article updated on 2013-07-30 20:39:16