How to Write Theta Symbol (θ) in LaTeX

In LaTeX, you can write the theta symbol using the \theta command for the lowercase theta (θ) and the \Theta command for the uppercase theta (Θ).

The following examples show how to write the theta symbol in LaTeX.

How to Write the Theta Symbol in Text

We can use the \theta command to write the lowercase theta symbol in LaTeX document for text.

Suppose we want to write the theta symbol in the text.

We can use the following LaTeX code to do so:

\documentclass{article}
\begin{document}

This is an example of using the theta symbol \(\theta\) in a sentence.

\end{document}

Output: 👇️

This is an example of using the theta symbol θ in a sentence.

In this example, we use the \theta command to display the lowercase theta symbol in the text.

How to Write the Theta Symbol in Mathematical Expressions

For mathematical expressions, we can use the \theta command to ensure proper formatting.

Suppose we would like to write mathematical expressions that contain the theta symbol.

We can use the following LaTeX code to do so:

\documentclass{article}
\begin{document}

An inline mathematical expression: \( \alpha + \beta = \theta \).

A displayed mathematical expression:
\[
\alpha^2 + \beta^2 = \theta^2
\]

\end{document}

Output: 👇️

In this example, we use the \theta command to denote the theta symbol in both inline and displayed mathematical expressions.

Conclusion

We can use the \theta command for both text and mathematical expressions. This ensures that the theta symbol is properly formatted and displayed in LaTeX document.