Why error in first?and not in the second one?

Question

A=3
print('mom'+A)
Traceback (most recent call last):
File "source_file.py", line 2, in <module>
print('mom'+A)
TypeError: can only concatenate str (not "int") to str

A=3
print('mom'*A)
Output:mommommom

Answer 1

3 is not a string, but a number. In Python you can not add a number to a string, because it's not defined.

If you want to do it, you'd first have to convert the number to a string:

print('mom' + str(A))

* on the other hand is defined for strings: It means 'gimme A times that string'.