JavaScript Break and Continue Statements

Deddy T — Tue, 18 Aug 2020 17:43:48 +0000

Having worked with JavaScript for a long while now, there are times when you will find the need to break out of a loop when a certain condition is met, or just skip the current iteration to the next iteration for one reason or another.
These situations can be solved by using the following statements:

break statement
continue statement

These statements can really come in handy to certain logic in the code or especially when wanting to avoid the long way of breaking a loop or skipping an iteration.

Let’s see how they can be used.

Break Statement

The break statement is used to terminate a loop and get out of it. Then, the code following the loop code block will be executed next (if any).

It is usually used inside a conditional statement whereby when a condition is met, for one reason or another, it stops the loop and gets out of it. How it is done is by simply writing break.

Syntax:

break;

Example:

for (let i = 0; i < 8; i++) {
  if (i === 4) { break; }
  console.log("Iteration i: " + i);
}

// Output:
Iteration i: 0
Iteration i: 1
Iteration i: 2
Iteration i: 3

Without the break statement, the output will typically appear as follow:

// Output:
Iteration i: 0
Iteration i: 1
Iteration i: 2
Iteration i: 3
Iteration i: 4
Iteration i: 5
Iteration i: 6
Iteration i: 7

So, to recap, based on the example above we can see that when condition is met, the break statement is run and as the result, it terminates the loop immediately.

This statement also can be used in the switch statements which are like conditional statements. However, for this article, we will only take a look at the use for loops.

Continue Statement

The continue statement is used to skip an iteration of the loop.
This statement too, can be used in the switch statements.

The continue statement basically breaks one iteration of the loop, if a specified condition is met, and continues with the next iteration of the loop. How it is written is similar to the break statement.

Syntax:

continue;

Example:

for (let i = 0; i < 8; i++) {
  if (i === 4) { continue; }
  console.log("Iteration i: " + i);
}

// Output:
Iteration i: 0
Iteration i: 1
Iteration i: 2
Iteration i: 3
Iteration i: 5
Iteration i: 6
Iteration i: 7

Using the example above, we can see that the iteration 4 is skipped because we wrote that when it is 4, we will continue to the next iteration. Thus, its turn is skipped from being printed out.

That’s all for the two statements for now. They are just useful basics that might be used often in your code.

I hope this article is of help to you. If you think that this article is helpful and it can be of help to other people, please share for them to read as well. Your thoughts and comments are also welcome!

Thanks for reading~

Python Number Formatting Binary Type

Deddy T — Thu, 30 Jul 2020 20:21:41 +0000

Having done a side mini project that involved binary formatting in one of the popular languages, Python, I encountered quite a difficulty in researching the different methods that can be used.

They are all over the place! So, I have tried to compile the different ways that I have found into this one short article. Here are some of the methods that I found myself use quite a couple of times in Python.

The simplest one would be this one for converting Integer into Binary form of String type:

>> bin(int) # return “0bXXX”
# It will return a bunch of 0s and 1s with 0b in front

The following would look similar to each other as they make use of the method format(), but in different ways of writing:

>> “{0:b}”.format(int) 
# It will return a bunch of 0s and 1s (return XXX)
>> format(int, ‘b’) 
# It will return a bunch of 0s and 1s (return XXX)
>> format(int, “0b”) 
# It will return a bunch of 0s and 1s (return XXX)

Here are the examples for the methods above:

>> bin(2)       # Output: 0b10
>> format(2, ‘b’)   # Output: 10
>> format(2, “0b”)  # Output: 10
>> “{0:b}”.format(2)    # Output: 10

In order to convert back to decimal, simply use this one for the simplest one:

>> int(x, base)
# int(x, 2)

That’s all for now. I hope this article will help some people that are looking for different ways of conversion. Thank you for reading!

If you like what I write, please share it for others to read. Please share any of your own ways of binary conversion on the comment section if any!

Forem: Deddy T

JavaScript Break and Continue Statements

Break Statement

Continue Statement

Python Number Formatting Binary Type