total cycle four times < br / > for the first time, I = 1, j = 1 < br / > the second time, I = 1, j = 2 < br / > the third time, I = 2, j = 1 < br / > for the fourth time, i=2,j=2
sum is the sum of the four times i and j, which is 12
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total cycle four times < br / > for the first time, I = 1, j = 1 < br / > the second time, I = 1, j = 2 < br / > the third time, I = 2, j = 1 < br / > for the fourth time, i=2,j=2
sum is the sum of the four times i and j, which is 12
the first cycle 1 + 1 < br / > the second loop 1 + 2 < br / > the third cycle 2 + 1 < br / > the fourth cycle 2 < br / > 2 + 2 + 3 + 3 + 4 it is 12
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