# What is a sigma word?

### What is a sigma word?

Sigma /ˈsɪɡmə/ (uppercase Σ, lowercase σ, lowercase in word-final position ς; Greek: σίγμα) is **the eighteenth letter of the Greek alphabet**. In the system of Greek numerals, it has a value of 200. In general mathematics, uppercase ∑ is used as an operator for summation.

### How do I do equations in Word?

**If you need to use an equation, add or write it in Word.**

- Select Insert > Equation or press Alt + =.
- To use a built-in formula, select Design > Equation.
- To create your own, select Design > Equation > Ink Equation.
- Use your finger, stylus, or mouse to write your equation.

### How to type the Sigma symbol in Microsoft Word?

It also has the alt code and the keyboard shortcut. To type the symbol for standard deviation (sigma) in Word using the shortcut, first type the alt code (03C3), then press Alt+X immediately to convert the code into a sigma symbol. Note that this shortcut works in Microsoft Word but not in Excel.

### Can you put sigma sign on your keyboard?

You can assign sigma symbol σ and any other text characters to your keyboard using this technique. 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.

### Is there an alt code for the Sigma symbol?

The alt code for the Sigma symbol in 03C3. However, just typing this code won’t give you the symbol. Instead, below are the steps to get the sigma symbol into your Word document using the sigma alt code: Place the insertion pointer at where you want to insert the sigma symbol. Immediately press Alt+X after typing the alt code.

### What is the meaning of the Sigma symbol?

The sigma summation symbol 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. Click on a Sigma symbol below to copy it out to clipboard automatically. Or look below to find out how to type sum symbol with keyboard using different techniques ...