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Latex how to write underscore

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Latex how to write underscore

To write underscore symbole in LateX, you must use backslash to protect it like follows

$\_$ is underdscore
$a\_b$ is a underdscore b
$a\_b\_c$ is a underdscore b underscore c

which gives

$\_$
$a\_b$
$a\_b\_c$

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