LaTeX Defined as Equal (:=) - Complete Guide
The defined as equal symbol (:=) indicates a definition.
Symbol Preview
Defined as Equal
LaTeX Code
No package required
:=Defined as
No package required
\coloneqColon equals
What is the LaTeX Defined as Equal?
Used to denote that the left side is defined to equal the right side.
How to Use Defined as Equal in LaTeX
Method 1: Using :=
✅No package required
Defined as
Example: Using :=
\documentclass{article}
\begin{document}
% Using the Defined as Equal
Text with :=
\end{document}Method 2: Using \coloneq
✅No package required
Colon equals
Example: Using \coloneq
\documentclass{article}
\begin{document}
% Using the Defined as Equal
Text with \coloneq
\end{document}Common Use Cases
The Defined as Equal symbol is commonly used in the following contexts:
Definition
Define a new quantity.
Code
$S := \{x : x > 0\}$Output
S := {x : x > 0}
Complete Examples
Definition Example
Using defined as operator
\documentclass{article}
\begin{document}
Let $n := 2m + 1$ be odd.
\end{document}Frequently Asked Questions
Which method should I use?
We recommend using the method marked as "Recommended" above. However, the best method depends on your specific needs:
- :=: Defined as
- \coloneq: Colon equals
Where do I use this symbol?
This symbol can be used:
- In mathematical equations (math mode)
- In regular text (if using text mode)
- In various document environments
Can I use this in display mode?
Yes, symbols that work in math mode (between $ $) also work in display mode (between $$ $$). This allows you to display the symbol on its own line with larger formatting.
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