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Letter Writing
In letter writing "_" is not allowed when used it gives an error "$" ?
what can be used as replacement for "_" ?

LaTeX Letter-Writing 04-05 min 30-40 sec 29-08-15, 1:03 p.m.


Incase you wanted to have a subscript text such as h20 you could either use "H\\textsubscript{2}0"
or $H_{2}0$
Use $..$ to get the subscript effect _ and use ^ to get superscript effect.
30-09-15, 3:10 p.m. erankikiran

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