How to include digital font in css?

// code in your css
//src: font file source.


@font-face {
font-family: digital;
src: url("path-to-the-font-file/digital.otf") format("opentype");
}




h1 { font-family: "digital",Helvetica,Arial,sans-serif; font-size:43px; line-height:37px; font-weight:normal;}


h2 { font-family: "digital",Helvetica,Arial,sans-serif; font-size:16px;line-height:14px; font-weight:normal;}


h3 { font-family: "digital",Helvetica,Arial,sans-serif; font-size:16px;line-height:14px; font-weight:normal; color:#c4161c; margin:6px 0 6px 0;}