The while loop contains a condition,
which is checked at the beginning of
each iteration of the loop.
If the condition evaluates to true,
then the code block is executed
and
then the loop moves to its next iteration.
If the condition evaluates to false,
then the execution of the loop is stopped.
Let's look at the example given below,
where we print the numbers from 1 to 5
using a while loop.
Here, we first initialize
a variable iteration
with the value 1.
We then start a while loop,
the steps for which are as follows:
Step 1 -
At the beginning of the first iteration,
the condition iteration < 6 is evaluated.
Since the current value of iteration is 1,
the condition evaluates to true.
Step 2 -
The code block of the loop is then executed,
where we print the value of iteration to the console
and
increment the value of iteration by 1.
Step 3 -
The loop then moves on to the next iteration,
wherein it repeats the steps from Step 1.
These steps are repeated
as long as the condition of
the while loop evaluates to true.
At one point,
the value of iteration will become 6
at the beginning of an iteration,
due to which the condition
iteration < 6 will evaluate to false.
At that point, the execution
of the loop is stopped.