basics

str = 'hello world'
print(str)
print(str[0])
print(str[0:5])
print(str[6:])
print(str+'test')
print(str+'\ntest')
print(str*3)
print('word' in str)
print('world' in str)

hello world h hello world hello worldtest hello world test hello worldhello worldhello world False True