1561947000
In this tutorial, you will learn how to use JavaScript comparison operators to compare two values.
To compare two values, you use the comparison operators. The following table illustrates the JavaScript comparison operators:
A comparison operator returns a Boolean value indicating that the comparison is true or not. See the following example:
let r1 = 20 > 10; // true
let r2 = 20 < 10; // false
let r3 = 10 == 10; // true
The comparison operator takes at least two values (or operands). If one of the two values has a different type, JavaScript will perform a conversion based on specific rules before comparing them. We will discuss each rule in detail in the following sections.
If the operands are numbers, JavaScript will perform a numeric comparison. For example:
let a = 10,
b = 20;
console.log(a >= b); // false
console.log(a == 10); // true
This example is straightforward. the variable a
is 10
, b
is 20
. The a>=b
expression returns and a==10
expression returns true
.
If the operands are strings, JavaScript compares the character codes numerically one by one in the string.
let name1 = 'alice',
name2 = 'bob';
let result = name1 < name2;
console.log(result); // true
console.log(name1 == 'alice'); // true
Because JavaScript compares character codes in the strings numerically, you may receive an unexpected result, for example:
let f1 = 'apple',
f2 = 'Banana';
let result = f2 < f1;
console.log(result); // true
In this example, f2
is less than f1
because the letter B
has the character code 66
while the letter a
has the character code 97
.
To fix this, you must first convert strings into a common format, either lowercase or uppercase and then perform comparison as follows:
let result2 = f2.toLowerCase() < f1.toLowerCase();
console.log(result2); // false
Note that the toLowerCase()
is a method of the String object that converts the string itself to lowercase.
#javascript #programming #developer #web-development
1622036598
JavaScript is unarguablly one of the most common things you’ll learn when you start programming for the web. Here’s a small post on JavaScript compound assignment operators and how we use them.
The compound assignment operators consist of a binary operator and the simple assignment operator.
The binary operators, work with two operands. For example a+b where + is the operator and the a, b are operands. Simple assignment operator is used to assign values to a variable(s).
It’s quite common to modify values stored in variables. To make this process a little quicker, we use compound assignment operators.
They are:
You can also check my video tutorial compound assignment operators.
Let’s consider an example. Suppose price = 5 and we want to add ten more to it.
var price = 5;
price = price + 10;
We added ten to price. Look at the repetitive price variable. We could easily use a compound += to reduce this. We do this instead.
price += 5;
Awesome. Isn’t it? What’s the value of price now? Practice and comment below. If you don’t know how to practice check these lessons.
Lets bring down the price by 5 again and display it.
We use console.log command to display what is stored in the variable. It is very help for debugging.
Debugging let’s you find errors or bugs in your code. More on this later.
price -= 5;
console.log(price);
Lets multiply price and show it.
price *=5;
console.log(price);
and finally we will divide it.
price /=5;
console.log(price);
If you have any doubts, comment below.
#javascript #javascript compound assignment operators #javascript binary operators #javascript simple assignment operator #doers javascript
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Who invented JavaScript, how it works, as we have given information about Programming language in our previous article ( What is PHP ), but today we will talk about what is JavaScript, why JavaScript is used The Answers to all such questions and much other information about JavaScript, you are going to get here today. Hope this information will work for you.
JavaScript language was invented by Brendan Eich in 1995. JavaScript is inspired by Java Programming Language. The first name of JavaScript was Mocha which was named by Marc Andreessen, Marc Andreessen is the founder of Netscape and in the same year Mocha was renamed LiveScript, and later in December 1995, it was renamed JavaScript which is still in trend.
JavaScript is a client-side scripting language used with HTML (Hypertext Markup Language). JavaScript is an Interpreted / Oriented language called JS in programming language JavaScript code can be run on any normal web browser. To run the code of JavaScript, we have to enable JavaScript of Web Browser. But some web browsers already have JavaScript enabled.
Today almost all websites are using it as web technology, mind is that there is maximum scope in JavaScript in the coming time, so if you want to become a programmer, then you can be very beneficial to learn JavaScript.
In JavaScript, ‘document.write‘ is used to represent a string on a browser.
<script type="text/javascript">
document.write("Hello World!");
</script>
<script type="text/javascript">
//single line comment
/* document.write("Hello"); */
</script>
#javascript #javascript code #javascript hello world #what is javascript #who invented javascript
1616670795
It is said that a digital resource a business has must be interactive in nature, so the website or the business app should be interactive. How do you make the app interactive? With the use of JavaScript.
Does your business need an interactive website or app?
Hire Dedicated JavaScript Developer from WebClues Infotech as the developer we offer is highly skilled and expert in what they do. Our developers are collaborative in nature and work with complete transparency with the customers.
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#hire dedicated javascript developers #hire javascript developers #top javascript developers for hire #hire javascript developer #hire a freelancer for javascript developer #hire the best javascript developers
1619565060
What is a ternary operator: The ternary operator is a conditional expression that means this is a comparison operator and results come on a true or false condition and it is the shortest way to writing an if-else statement. It is a condition in a single line replacing the multiline if-else code.
syntax : condition ? value_if_true : value_if_false
condition: A boolean expression evaluates true or false
value_if_true: a value to be assigned if the expression is evaluated to true.
value_if_false: A value to be assigned if the expression is evaluated to false.
How to use ternary operator in python here are some examples of Python ternary operator if-else.
Brief description of examples we have to take two variables a and b. The value of a is 10 and b is 20. find the minimum number using a ternary operator with one line of code. ( **min = a if a < b else b ) **. if a less than b then print a otherwise print b and second examples are the same as first and the third example is check number is even or odd.
#python #python ternary operator #ternary operator #ternary operator in if-else #ternary operator in python #ternary operator with dict #ternary operator with lambda
1589255577
As a JavaScript developer of any level, you need to understand its foundational concepts and some of the new ideas that help us developing code. In this article, we are going to review 16 basic concepts. So without further ado, let’s get to it.
#javascript-interview #javascript-development #javascript-fundamental #javascript #javascript-tips