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Listed below are example programs that print "hello world", written in the following languages:
[ C | C++ | Haskell | Lua | OCaml | PHP | Perl | Python | Ruby | Scheme ]

C:
pasted 1 hour ago: 
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#include <stdio.h>
int main() {
	printf("Hello, world!\n");
	return 0;
}
view (5 lines, 1 line of output)
pasted 2 hours ago: 
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#include <stdio.h>
int main() 
{
printf("hello world");
return 0;
}
view (6 lines, 1 line of output)


C++:
pasted on Sep 2: 
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#include<iostream>

using namespace std;

int main(){

        cout<<"Hello World!"<<endl;

return 0;

}
view (11 lines, 1 line of output)
pasted on Sep 2: 
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#include<iostream>

using namespace std;

int main(){

        cout<<"Hello World!"<<endl;

return 0;

}
view (11 lines, 1 line of output)


Haskell:
pasted on Jun 13: 
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main = do { putStrLn "Hello World"; }
view (1 line, 1 line of output)


Lua:
gerson - pasted on Aug 26: 
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print("hello, world!")
view (1 line, 1 line of output)
pasted on Jul 14: 
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print("Hello World")
view (1 line, 1 line of output)


OCaml:
pasted on Apr 10: 
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print_endline "Hello World!"
view (1 line, 1 line of output)


PHP:
pasted on Aug 20: 
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<?php
echo "Hello, World!";
?>
view (3 lines, 1 line of output)
pasted on Aug 13: 
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<?php
echo 'hello world';
view (2 lines, 1 line of output)


Perl:
pasted on Jun 7: 
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print "Hello World"
view (1 line, 1 line of output)
pasted on Apr 6: 
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print "Hello World\n";
view (1 line, 1 line of output)


Python:
pasted on Sep 2: 
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print("hello world")
view (1 line, 1 line of output)
pasted on Sep 1: 
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print("hello world")
view (1 line, 1 line of output)


Ruby:
pasted on Jul 31: 
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puts "Hello, World!"
view (1 line, 1 line of output)
pasted on Jul 14: 
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a = 'hello world'

print a
view (3 lines, 1 line of output)


Scheme:
pasted on Aug 6: 
1

(display "Hello, World!")
view (1 line, 1 line of output)
pasted on Jun 20: 
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(display "hello world")
view (1 line, 1 line of output)