Loops are used to execute a code block many times.
A loop can be used to print all numbers in certain range. Like from 1 to 10
Output:
At line 9
the condition of the loop is set. Since num
is less than 10 the
loop executes.
In order to print the numbers to 10, num
increases by 1 at line 12
.
The loop ends when num
reaches value of 11.
Infinite Loop has a condition that's always true.
It can be created due to development mistake or used in advanced algorithm.
Here are examples:
Output:
Since num
is never changed, the condition num < 5
is always true
and the loop executes infinitely (or until the program takes more ram than it is allowed).
In order to end the loop num
needs to be incremented (like num++
) inside the loop's body.
Output:
Since the condition at line 9
is always true
, the loop keeps on repeating.