username = input('username: ')
print('welcome', username) # print各項間默認以空格作為分隔符
print('welcome ' + username) # 注意引號內(nèi)最后的空格
username = input('username: ')
print('welcome', username)
print('welcome ' + username)
username = input('username: ')
print('welcome', username) # print各項間默認以空格作為分隔符
print('welcome ' + username) # 注意引號內(nèi)最后的空格
username = input('username: ')
print('welcome', username)
print('welcome ' + username)