LaTeX Integral (∫) - 完全ガイド

The integral symbol (∫) represents integration in calculus.

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∫

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

LaTeX Integralとは？

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.

LaTeXでのIntegralの使い方

方法 1: \intを使用

✅パッケージ不要

Integral symbol

\intの使用例

latex

\documentclass{article}

\begin{document}

% Using the Integral
Text with \int

\end{document}

方法 2: \iintを使用

✅パッケージ不要

Double integral

\iintの使用例

latex

\documentclass{article}

\begin{document}

% Using the Integral
Text with \iint

\end{document}

方法 3: \iiintを使用

✅パッケージ不要

Triple integral

\iiintの使用例

latex

\documentclass{article}

\begin{document}

% Using the Integral
Text with \iiint

\end{document}

一般的なユースケース

Integral記号は、主に以下の文脈で使用されます:

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

完全な例

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}