Tuesday, January 14, 2020
FREE JAVASCRIPT LESSON 9
Hi
friends, I’m undoubted you are doing great. I’m glad you made your way to this
lesson. Today, I will be teaching you another interesting topic known as
Concatenation.
By the end of this
lesson, you will agree with me that the most useful operator primarily for
strings is no other thing but concatenation.
At this point, you may be wondering what the heck is concatenation. Well that is what I’m about to
discuss with you in this lesson. So calm down, pour yourself a cup of coffee
and relax. I promise to take you by hand and work you through all you need to
know about this subject matter without confusion or any form of difficulty.
To
start with, concatenation simply means joining strings of text together. Put
differently, concatenation is the act of building up strings by joining
multiple strings together. So, the verb “concatenate” means to join together two or
more strings. Concatenation is represented by the + sign. (NB: Don’t mistake this to plus sign).
Example
To
get this more clearer, open your text editor on your smartphone or computer,
and enter the following codes:
<!DOCTYPE
html>
<html>
<head>
<title></title>
</head>
<body>
<script>
var
firstString = "I am learning ";
var
secondString = "JavaScript with Codinglegit!";
document.write(firstString
+ secondString);
</script>
</body>
</html>
Save it with .html extension and
then open it to see an amazing result that will display on your screen
Note The following carefully
The
things you should take note of are those things in between the two script tags. First is the declaration of the two variables (i.e firstString and secondString).
Secondly,
the two string variables were assigned a value each (i.e
“I am learning " and
“JavaScript
with Codinglegit!")
And finally, we concatenates them (or joins
them together using this the plus sign +
.
Also, remember that whenever you put something
for example, numbers in quotation mark (“
“), JavasScript will treat that number as a string and not as a number.
We
will be treating a more interesting topic in our next lesson.
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