Boolean operators in for loops

[modern quest]

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[torpid sedge]

int i = 5, j = 2, k = 4, l = 3, m = 7, n = 8;
for ( i = 1, j = 3, k = 4; i++ < l || ++j < m && k < n; )
cout << i << " " << j << " " << k << " " << l << " " << m << endl;

OUTPUT : 2 3 4 6 7
3 3 4 3 7
4 4 4 3 7
5 5 4 3 7
6 6 4 3 7

I don't understand why j = 3 on the first line as you are incrementing it