How to use infinity(∞) symbol in LaTeX?

Type of symbolMathematics
Package (requirement)No
Latex command\infty
Example\infty → ∞

One of the most popular symbols in mathematics is Infinity, the \infty command used to write this symbol in latex.

Below are some examples of the use of \infty command.

  \[ \int_{-\infty}^\infty exp(-x^2)dx \]
  \[ \sum^\infty_{k=1} k \]

Output :

Infinity symbol.

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