difference after remove

[Shi Mu]

Is there any difference if I remove the '/'
from the following statement?
intMatrix2 = [[1,1,2,4,1,7,1,7,6,9],\
             [1,2,5,3,9,1,1,1,9,1],\
             [0,0,5,1,1,1,9,7,7,7]]
print intMatrix2
I removed one '\' and it still works.
So what is the use of '\'?
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