Question

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Why use a for loop instead of a while loop?

I am currently using embedded c. Software that i am using is keil uvision.

So i have a question regarding on which loop will u use?
Both loop does the exact same thing. As long as signal = 0, ‘i’ will increase by 1.

Firstly,

for(;signal==0;)
{
    i++;
}

The next program:

while(signal==0)
{
    i++;
}

So which loop would you use and Why? What is the difference between both of them?
Does it have any difference in terms of time taken to execute? Or it is purely based on your preference?

Answer 1

Generally speaking, for loops are preferred when the number of iterations is known (i.e. for each element in an array), and while loops are better for more general conditions when you don’t know how many times you’ll run the loop. However, a for loop can do anything a while loop can, and vice versa; it all depends on which one makes your code more readable

In this case, a while loop would be preferable, since you’re waiting for signal == 0 to become false, and you don’t know when that will occur.