LaTeX Integral (∫) - Complete Guide

The integral symbol (∫) represents integration in calculus.

Symbol Preview

∫

Integral

LaTeX Code

Method 1: Using \int

No package required

Recommended

\int

Integral symbol

Method 2: Using \iint

No package required

\iint

Double integral

Method 3: Using \iiint

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}