you means in hindi is "तुम" . you can also use "आप". तुम/तु is mostly used when u are talking to younger ppl or to friends. "आप" is humble keywords for you. When u are talking to respectable or elder ppl. you can use आप. तुम you can pronounicate like TUM and आप like AAP. For example, TUM KAISE HO/ AAP KAISE HO (HOW ARE YOU)

'तू ' is the right one,('तु' is not a word.) but i would like to tell you something more...instead of using 'तू ' (because it doesn't show manner to somebody and a slang word) you should use 'तुम'(for younger and for your friends) and 'आप'(for elders and respected person), 'आप' shows more respect as in our Indian culture we give respect to our elders. In English, there is only one word for both तुम & आप which is 'you'. I HOPE THAT IT WILL COME HANDY. (let me know if you need my help)

1) If you address an elderly person youe are to address him as "AAP" (to show respect) 2) If you address a formal friend or a person of your age and status you are to address him as "TUM" 3) In case you address a person who is younger to you and of a lower status, you address him as "TOO" Ravi Sharma

तुम = you ex;- तुम कैसे हो? (tum kaise ho) - How are you