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Latex how to write text in math mode

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It is sometimes useful to add text in Latex formulas or equations. However, it is clear that the text in question is displayed in italics. How to put text in math and what is the way of embedding text into math mode: \textrm , \text


Latex how to write text in math mode: \textrm

To write text in math mode use \textrm:

$u_2 = \textrm{Second element of the sequence } u_n$

$$u_2 = \textrm{Second element of the sequence } u_n$$

Do not forget the space before closing !!!

Without \textrm, it is not beautiful:

$u_2 = Second element of the sequence u_n$

$$u_2 = Second element of the sequence u_n$$

Latex how to write text in math mode with amsmath package: \textrm

Do not forget in preamble to add amsmath package:

\usepackage{amsmath}

To write text in math mode use with amsmath package \text:

$u_2 = \text{Second element of the sequence } u_n$

$$u_2 = \text{Second element of the sequence } u_n$$

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