该变量的值如何在此循环之外递增？

Question

I have a question for the value of j inside this nested loop.

    for (potentialSum=1; potentialSum<=m; potentialSum ++)
    {
         for (j=1;j<=n;j++)
         {
             if (potentialSum == 2) {
                 printf("j:%d in loop\n", j);
             }
         }

         C[potentialSum]=(j<=n) ? j : (-1);

         if (C[potentialSum] == -1) {
              printf("j:%d n:%d \n", j , n);
         }

    }

n = 0 and m = 25.

So when I run this loop with the aforementioned values for n and m, I get an output something like this:

j:1 in loop
j:2 in loop
j:3 in loop
j:4 in loop
j:5 in loop
j:6 in loop
j:7 in loop
j:8 n:7 // Outside of loop

My question is when/how does j get incremented to 8, if n=7 ?

This only happens when potentialSum = 2 , for the complete code click here and for a copy of the input click here .

Thanks for all the help in advance, I'm just really not seeing how j goes from 7 to 8 outside of the loop.

Answer 1

for (j=1;j<=n;j++)   //where n is 7

for( declaration ; comparison(condition checking) , increment/decrement)

after declaration, value is compared, and at the end its incrementing ( j++ )

when j=7 it will check condition j<=n which is true so it will go inside the loop. and at the it will increment j++ .
Now current value of j will become 8 . Next time it will check condition j<=n which is false so it will come out of the loop, but j will remain 8 .