Three ways to concatenate strings in Python

1. Connect ' AA ' BB between strings

Can be a space or nothing at the center.

Then the output is closely connected to each other.

2. String + number

' AA ' +90

This will cause an error, because different types cannot be added,

can be used ' AA ', 90. This is possible, but there is a space in the middle.

3,% placeholder

print '%s,%s '% (' Tom ', ' Jerry ')

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2. >>> Print ' aaa ',
4. AAA
6. >>> print ' AA '
8. Syntaxerror:invalid syntax
10. >>> print ' AA ' +
14. Traceback (most recent):
16. File "<pyshell#5>", line 1, in <module>
18. print ' AA ' +
20. Typeerror:cannot concatenate ' str ' and ' int ' objects
22. >>> print ' AA ' +' CAA '
24. Aacaa
26. >>> print ' aa ' bb '
28. Aabb
30. >>> print ' AA 'rr '
32. Aarr
34. >>> print ' AA ',
36. AA
38. >>> print '%s,%s '% (' Tom ',' Jerry ')
40. Tom,jerry
42. >>> '%s,%d '% (' Tom ', ' a ')
44. ' Tom,56 '
46. >>>

Three ways to concatenate strings in Python