Writing Greek text [duplicate]

Question

I am trying to compile some Greek text in PDF. I get it compiled using babel package, but text in Greek renders as complete gibberish. Only if I write Latin text does it convert it into Greek letters, but I have text in Greek to begin with.

Here are my two closest tries

\documentclass[12pt]{article}

\usepackage[greek,english]{babel}

\begin{document}

\section{Introduction}
\begin{otherlanguage}{greek}
ἀλλ' οὐ λέγουσι τὸ διὰ τί περὶ οὐδενός, οἷον διὰ
\end{otherlanguage}

\textgreek{ἀλλ' οὐ λέγουσι τὸ διὰ τί περὶ οὐδενός, οἷον διὰ} 

and another one

\documentclass[12pt]{article}
\usepackage[english,greek]{babel}
\usepackage[iso-8859-7]{inputenc}

\begin{document}

\section{Εισαγωγή}

Σήμερα είδα για πρώτη φορά το
\selectlanguage{english} site
\selectlanguage{greek}του Γιάννη.

\end{document}

output for both

ὐὤὐὡἑᾥᾠ ὓᾲἑᾢᾠὐᾥ
ΕΠ́ΗϕΕΕϕΕΕ

Answer 1

Try

\usepackage[utf8x]{inputenc}

See http://tobi.oetiker.ch/lshort/lshort.pdf page 32 footnote.

Answer 2

When you search this site, you could find quite a few answers to your question.

Personally, I would use LuaLaTeX. With LuaLaTeX you could just type Greek without any additional packages -- provided that you use a font that contains all the Greek characters (and accents) you are about to use. And: you don't need to learn new syntax or commands if you switch from LaTeX to LuaLaTeX.

For a document, that is completely in Greek:

% !TEX TS-program = lualatexmk
\documentclass[11pt,a4paper]{scrartcl}

\usepackage{fontspec}
\setmainfont[Ligatures=TeX]{Arial Unicode MS}

\begin{document}

πάντες ἄνθρωποι τοῦ εἰδέναι ὀρέγονται φύσει. σημεῖον δ᾽ ἡ τῶν αἰσθήσεων ἀγάπησις: 
καὶ γὰρ χωρὶς τῆς χρείας ἀγαπῶνται δι᾽ αὑτάς, καὶ μάλιστα τῶν ἄλλων ἡ διὰ τῶν 
ὀμμάτων. οὐ γὰρ μόνον ἵνα πράττωμεν ἀλλὰ καὶ μηθὲν μέλλοντες πράττειν τὸ ὁρᾶν 
αἱρούμεθα ἀντὶ πάντων ὡς εἰπεῖν τῶν ἄλλων. αἴτιον δ᾽ ὅτι μάλιστα ποιεῖ γνωρίζειν 
ἡμᾶς αὕτη τῶν αἰσθήσεων καὶ πολλὰς δηλοῖ διαφοράς. φύσει μὲν οὖν αἴσθησιν ἔχοντα 
γίγνεται τὰ ζῷα, ἐκ δὲ ταύτης τοῖς μὲν αὐτῶν οὐκ ἐγγίγνεται μνήμη, τοῖς δ᾽ ἐγγίγνεται.

\end{document}

And if you need both English and Greek:

% !TEX TS-program = lualatexmk
\documentclass[11pt,a4paper]{scrartcl}

\usepackage{fontspec}
\setmainfont[Ligatures=TeX]{Times New Roman}
\newfontfamily\greekfont[Scale=MatchUppercase,Ligatures=TeX]{Arial Unicode MS}

\newcommand{\textgreek}[1]
    {\bgroup\greekfont{#1}\egroup} % Greek text

\newenvironment{greekpar}           % Greek paragraph
    {\greekfont}{}

\begin{document}

This is English with some Greek: \textgreek{γέγονεν}.

\begin{greekpar}
πάντες ἄνθρωποι τοῦ εἰδέναι ὀρέγονται φύσει. \textrm{And this is a Greek paragraph with some English.} σημεῖον δ᾽ ἡ τῶν αἰσθήσεων ἀγάπησις: καὶ γὰρ χωρὶς τῆς χρείας ἀγαπῶνται δι᾽ αὑτάς, καὶ μάλιστα τῶν ἄλλων ἡ διὰ τῶν ὀμμάτων. οὐ γὰρ μόνον ἵνα πράττωμεν ἀλλὰ καὶ μηθὲν μέλλοντες πράττειν τὸ ὁρᾶν αἱρούμεθα ἀντὶ πάντων ὡς εἰπεῖν τῶν ἄλλων. αἴτιον δ᾽ ὅτι μάλιστα ποιεῖ γνωρίζειν ἡμᾶς αὕτη τῶν αἰσθήσεων καὶ πολλὰς δηλοῖ διαφοράς. φύσει μὲν οὖν αἴσθησιν ἔχοντα γίγνεται τὰ ζῷα, ἐκ δὲ ταύτης τοῖς μὲν αὐτῶν οὐκ ἐγγίγνεται μνήμη, τοῖς δ᾽ ἐγγίγνεται.
\end{greekpar}

Isn't that quite nice? \textgreek{εὕρηκα!}
\end{document}