mystr='I \' am a student'
print(mystr,type(mystr),len('My major is computer.'))
print('c:\\address\name')
print(r'c:\\address\name')
print('hello, '+mystr,mystr*2)
print(mystr[3:5])
print(mystr+'\
    My major is computer')
print(mystr.find('am'))
print(mystr.lower(),mystr.upper())
print(mystr.replace('student','teacher'))