I am not getting that what is printf, backslash ,escape sequence,main semiclone , return 0 pelase help me to get it .

Answer 1

Nasim akhtar ,

welcome to sololearn! since you have done now 4% of the C tutorial, you are on the very beginning of your learning path. i would suggest you to continue in learning from the tutorial. if you don't feel comfortable with that stuff currently, try to repeat the previous lessons. it is also important to practice in coding. start with some very simple and basic things, then proceed. do not move to fast, we are not at a car race here.
to get successful in coding means to work (hard) and practice and find your own pace for developing your knowledge. if you get stuck somewhere, you can post coding relevant questions here. sololearn has a great community and is willing to help.

be patient and never give up.
good success and happy coding!

Answer 2

So you don't get coding in general? I suggest you try the tutorial