LaTeX Integral (∫) - Complete Guide

The integral symbol (∫) represents integration in calculus.

Symbol Preview

∫

Integral

LaTeX Code

No package required

Recommended
\int

Integral symbol

No package required

\iint

Double integral

No package required

\iiint

Triple integral

What is the LaTeX Integral?

The integral symbol (∫) is fundamental to calculus and is used for both definite and indefinite integrals. Multiple integrals can be denoted with multiple integral signs.

How to Use Integral in LaTeX

Method 1: Using \int

✅No package required

Integral symbol

Example: Using \int

latex
\documentclass{article}

\begin{document}

% Using the Integral
Text with \int

\end{document}

Method 2: Using \iint

✅No package required

Double integral

Example: Using \iint

latex
\documentclass{article}

\begin{document}

% Using the Integral
Text with \iint

\end{document}

Method 3: Using \iiint

✅No package required

Triple integral

Example: Using \iiint

latex
\documentclass{article}

\begin{document}

% Using the Integral
Text with \iiint

\end{document}

Common Use Cases

The Integral symbol is commonly used in the following contexts:

Indefinite Integral

Antiderivative.

Code

$\int x^2 dx = \frac{x^3}{3} + C$

Output

∫ x² dx = x³/3 + C

Definite Integral

Area under curve.

Code

$\int_0^1 x^2 dx = \frac{1}{3}$

Output

∫₀¹ x² dx = 1/3

Complete Examples

Definite Integral

Definite integral calculation

latex
\documentclass{article}
\begin{document}

Compute the definite integral:
$$\int_0^2 x^2 dx = \left[\frac{x^3}{3}\right]_0^2 = \frac{8}{3}$$

\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:

  • \int: Integral symbol
  • \iint: Double integral
  • \iiint: Triple integral

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.

🔗 Related Symbols You May Need

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Summation

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