Not sure to understand how for loop iteration works.

Question

Hi! I'm not sure to understand how can I increment my mathTotal integer inside a for loop. And after that, should the bool status ("true") be inside that for loop or juste after? I did some google searches on it but I cannot find a really useful explanation (and something to unstuck me in that exercice). Any help? Thanks!

variable_assignment.mm

int mathTotal;
bool isComplete;

for (int i = 5; i < 26; i++) {
  mathTotal = i;
}
isComplete = true;

Answer 1 · 2016-03-09T15:47:37Z

March 9, 2016 3:47pm

Hey David Jehl,

This is how the code you posted is working:

First, the loop sets a local variable of i, with an Int value of 5. This is your counter.

Next, the loop evaluates for a condition. This means the loop will continue to execute while i is less than 26. If the condition is true, the code inside the loops body will be executed. The code in the body sets the value of mathTotal to the current value of i for that iteration.

Then, once this code inside the loop body is finished executing, the loop will increment your counter according to the incrementor we specified. This is i++, which will increase the value of i by 1.

The loop will then evaluate for the condition again, and continue this process until the condition evaluates to false for the first time. When the condition evaluates to false, the loop stops executing, and your code continues down the normal flow of execution.

In your example, after the loop has finished executing, you are setting the isCompleted variable to true.

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David Jehl

David Jehl

Not sure to understand how for loop iteration works.

1 Answer

Steven Deutsch

Steven Deutsch

David Jehl

David Jehl

Steven Deutsch

Steven Deutsch