How to Write Phi Symbol (φ) in LaTeX

In LaTeX, you can write the phi symbol using the \phi command for the lowercase phi (φ) and the \Phi command for the uppercase phi (Φ).

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

How to Write the Phi Symbol in Text

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

Suppose we want to write the phi 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 phi symbol \(\phi\) in a sentence.

\end{document}

Output: 👇️

This is an example of using the phi symbol φ in a sentence.

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

How to Write the Phi Symbol in Mathematical Expressions

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

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

We can use the following LaTeX code to do so:

\documentclass{article}
\begin{document}

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

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

\end{document}

Output: 👇️

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

Conclusion

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