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  1. -- Code
  2. function f(s,i)j=i or 0return#s>j and s..f(s:reverse(),j+1)or''end
  3.  
  4. -- Test cases
  5. print(f("Hello!"))
  6. print(f("a"))
  7. print(f("abcd"))
  8. print(f("OK!"))
  9. print(f("4815162342"))
  10. print(f("PPCG"))
  11. print(f("42"))
Success #stdin #stdout 0s 2844KB
comments (?)
stdin
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Standard input is empty
stdout
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Hello!!olleHHello!!olleHHello!!olleH
a
abcddcbaabcddcba
OK!!KOOK!
4815162342243261518448151623422432615184481516234224326151844815162342243261518448151623422432615184
PPCGGCPPPPCGGCPP
4224
https://ideone.com/ihcmS0
language:
Lua (luac 5.3.3)
created:
7 years ago
visibility:
public

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