

프로그램에서 문자열의 길이를 확인해 보세요.
[pʰɯlokɯlɛmesʌ munt͡ɕajʌlɰi kililɯl hwakinɛ posejo.]
Check the length of the string in the program.
이 문자열에는 숫자가 포함되어 있지 않아요.
[i munt͡ɕajʌlenɯn sutt͈͡ɕaka pʰoamtweʌ itt͈͡ɕi anajo.]
This string doesn't contain any numbers.
입력한 문자열을 거꾸로 출력해야 해요.
[imnjʌkʰan munt͡ɕajʌlɯl kʌk͈ulo t͡ɕʰulljʌkʰɛja hɛjo.]
You have to print the input string in reverse.
"문자열" is in the lesson "Geometric figures" (Level 45), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.