Question

Is one way preferential over another?

x = 5
print "ABC", x

x = 5
print "ABC" + str(x)

Answer 1

i think code that u have mentioned is perl style syntax but code u mentioned will aborted because of compilation syntax error

Answer 2

It depends on your purpose.
x = 5
print "ABC", x
adds a space in between 'ABC' and 5. This will print out 'ABC 5'

On the other hand,
x = 5
print "ABC" + str(x)
will print out 'ABC5'

Another way to print 'ABC 5' is by:
x = 5
print 'ABC %d' %x

%d serves as a place holder for an integer. You have to put in %variable after the string.