what code shall I use to underline

Answer 1

<u> your content line </u>

Answer 2

it depends on your requirement either you want your heading underlined or not
example:. <h1><u>This is underlined</u></h1>

Answer 3

<u/

Answer 4

only complete the arrow bracket

Answer 5

bold for b
n italic for i
just replace it with u

Answer 6

<u>text</u>

Answer 7

<u> underlined text </u>

Answer 8

insert

Answer 9

<u>....</u>

Answer 10

I have done it