Simply put, the loop structure repeatedly does something until the state is changed (see Figure 8-1).
Figure 8-1
The for loop structure
Example
Here is an example:
for (int i = 0; i < 100; i++) {
<do something>
}
There are three key elements in the for statement:
int i = 0: declare a counter variable and assign an initial value to it;
i < 100: define the condition to continue with the for loop; as long as this condition is true the loop will run, when it is not true, we stop and exit from ...
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