I referred the link : How do I change the font of a letter?. But the link didn't help me out. I would like to achieve this:

Here is the MWE though I know it isn't :(:
\documentclass{article}
\begin{document}
Hello World
\end{document}
I referred the link : How do I change the font of a letter?. But the link didn't help me out. I would like to achieve this:

Here is the MWE though I know it isn't :(:
\documentclass{article}
\begin{document}
Hello World
\end{document}
Taking into consideration the questions by the OP, and following both David's and John's answer, I'm trying to include a wider response:
If you just want to get a few letter in a bigger size than the others, you can ---as stated by the other answers--- just use {\huge H}ello {\huge W}orkd.
If you want to have a Drop Cap, you can use the lettrine package. E.g.:
\documentclass{report}
\usepackage{lettrine}
\begin{document}
{\huge H}ello {\huge W}orld.
This is a regular line. Lets say you want a drop cap in the next chapter.
\chapter{Chapter Name}
\lettrine{T}{his} is a beautiful drop cap. If you want to change the size of it, please refer to the lettrine package documentation.
\end{document}
Where the result is:


{\huge H}ello {\huge W}orld
Or look at packages such as lettrine

o closer to the W there is no automatic font kerns as you are changing font (even if only changing font size)
– David Carlisle
May 28 '14 at 13:01
\documentclass{article}
\newcommand*\9[1]{{\Huge#1}}
\begin{document}
\9Hello \9World
\end{document}

Wand the followingois way off, and I find this esthetically very displeasing. – Sverre May 28 '14 at 13:34