how to underline font in css

1h1 {
2  text-decoration: overline;
3}
4
5h2 {
6  text-decoration: line-through;
7}
8
9h3 {
10  text-decoration: underline;
11}
12
13h4 {
14  text-decoration: underline overline;
15}

1h3 {
2  text-decoration: underline;
3}

1/* Using 'text-decoration' property with 'underline' value. we can draw underline below the text using css */
2<style>
3p {
4  text-decoration: underline;
5}
6</style>
7<p>Hello all Welcome here !!!</p>