In this quick tutorial, we’ll show how to compare strings in JavaScript. We’ll look at two different approaches, first using the built-in operator, and then using a function.
Checkout this video:
Comparing strings
There are two ways to compare strings in JavaScript. The first way is to use the === operator. This operator compares both the value and the type of the two strings. The second way is to use the == operator. This operator only compares the value of the two strings without considering their type.
Comparing two strings
In JavaScript, there are two ways to compare strings:
1) By using the == operator
2) By using the === operator
The == operator compares two strings by their values, meaning that it will return true if the two strings have the same characters in the same order. For example:
“abc” == “abc” //true
“abc” == “abcd” //false
“abc” == “ABC” //false
The === operator compares two strings by their values and their type, meaning that it will only return true if the two strings have the same characters in the same order AND are both of the type string. For example:
“abc” === “abc” //true
“abc” === “abcd” //false
“abc” === “ABC” //false
Comparing more than two strings
So far we’ve only looked at comparing two strings, but what if we want to compare more than two? For example, what if we want to find the longest string in an array of strings?
We can use the sort() method to sort an array of strings in alphabetical order:
“`
var fruits = [“Banana”, “Orange”, “Apple”, “Mango”];
fruits.sort();
// the array is now [“Apple”, “Banana”, “Mango”, “Orange”]
“`
Comparing string values
In JavaScript, there are two different ways to compare strings: the === operator and the String.prototype.localeCompare() method. The === operator compares two values and returns true if they are the same, false if they are not. The String.prototype.localeCompare() method compares two string values and returns a number depending on whether the first string is less than, greater than, or equal to the second string.
Comparing string values with ===
JavaScript provides a simple way to compare two strings using the === operator. This operator returns true if the two values being compared are equal, and false if they are not equal.
Here is an example:
var a = “Hello”;
var b = “Hello”;
if (a === b) {
console.log(“The strings are equal.”);
} else {
console.log(“The strings are not equal.”);
}
Comparing string values with ==
In JavaScript, there are two ways to check if a variable contains a certain string value. The first is to use the == operator, which checks if the two values are equal to each other. The second is to use the === operator, which checks if the two values are equal and of the same type.
Using ==, you would check if the string “hello” was equal to the string “world” like this:
if (“hello” == “world”) {
// this code will never execute because the two strings are not equal
} else {
// this code will execute because the two strings are not equal
}
However, using ===, you would get a different result:
if (“hello” === “world”) {
// this code will never execute because the two strings are not equal and they are not of the same type
} else {
// this code will execute because the two strings are not equal or of the same type
Comparing string length
Comparing string length can be tricky. There are a few different ways to do it, but some methods are better than others. In this article, we’ll show you how to compare strings in JavaScript so that you can choose the best method for your needs.
Comparing string length with ===
When comparing two strings, “==” will check if the contents of the strings are equal. On the other hand, “===” will also check if the two strings are of the same type. In other words, “===” is more strict than “==”.
If you compare two strings with “==” and they happen to have the same contents, but are of different types, JavaScript will try to convert them to the same type before doing the comparison. If you want to compare two strings without JavaScript trying to convert them, you can use “===” instead.
Here’s an example:
var x = “5”;
var y = 5;
x == y // true (JavaScript converted y to a string before doing the comparison)
x === y // false
Comparing string length with ==
When comparing two strings, “==” checks whether the string variables contain the same characters in the same order. This works well most of the time, but it can cause problems with some strings. For example, “Hello” and “hello” are considered different by “==”.
To avoid these problems, you can use the “===”, which compares not only the characters but also their order.
Comparing string index
There are two ways to compare strings in JavaScript. The first way is to use the == and != operators. The second way is to use the === and !== operators. The == and != operators will compare the string values, while the === and !== operators will compare the string values and the string types.
Comparing string index with ===
If you want to check whether two strings are equal, you can use the === operator. This will return true if the two strings are exactly equal, and false otherwise.
For example:
“`javascript
var str1 = “abc”;
var str2 = “def”;
console.log(str1 === str2); //false
“`
Comparing string index with ==
JavaScript provides two different ways to compare strings:
The first way is using the == (equality) operator. This compares the two strings to see if they have the same characters in the same order. If they do, it returns true. If they don’t, it returns false. So, “hello” == “world” would return false because they don’t have the same characters in the same order. “hello” == “hello” would return true because they do have the same characters in the same order.
The second way is using the === (identity) operator. This compares the two strings to see if they have the same characters in the same order AND if they have the same type. So, “hello” === “world” would still return false because they don’t have the same characters in the same order. But “hello” === “Hello” would return false because they have the same characters in the same order but different types (string vs. undefined).
