In the first case, it returned true as the values were different. However, the “!=” or Strict inequality operator does not attempt to do so and returns false if the values are unequal or of different types.īoth these operators solve different purposes and hence I would recommend practicing them to facilitate further understanding.Ĭode and Explanation: console.log(5 != 10) This operator tries to compare values irrespective of whether they are of different types. The JavaScript not equal or inequality operator (!=) checks whether two values are not equal and returns a boolean value. This article is a good starting point for the same, however, we do emphasize more on the JavaScript not equal (!= & !=) operators. Given its vast usage, every developer should understand the functionality of each operator. Hence these operators are used in decision making or as conditional statements for loops. These operators return a boolean value (true or false) based on the condition. We also saw the difference between equal operator(=) and Strict equal operator(=) in JavaScript.Comparison operators in programming languages are used to compare two values.We have seen what strict equal operator ( =) and not strict equal operator(!=) are.As Comparison operators return a boolean value, they are widely used with conditional javascript statements like if-else statements and loops like for loop, while loop, etc.We learned that Comparison Operators in Javascript always return a boolean value, i.e.We saw the behaviour of Comparison Operators in Javascript when both the operands are of different data types.We learned how Comparison Operators in Javascript act on various data types.We got to know about different Comparison Operators in Javascript like >, =, We have seen the Comparison Operators in JavaScript.As undefined and null are strictly not equal hence undefined = null returns false. As undefined and null are loosely equal hence undefined = null returns true This operator is also called as Identity operator This operator is also called as Equality operator It returns true if both the operands are equal in value as well as data type It returns true if both the operands are equal in value irrespective of their data types It does not convert the operands to the common or same data type before the comparison It converts the operands to the common or same data type before the comparison It is used to compare the equality between the two operands strictly It is used to compare the equality between the two operands loosely Note that all of this process is performed internally by JavaScript. The toString() method returns a value that JavaScript uses for comparing an object with a non-object. In case if the valueOf() method is not present in that object, JavaScript calls the toString() method. valueOf() method as the name suggests returns the value. Hence to get this value from that object, JavaScript calls the valueOf() method. To compare an object with a non-object, JavaScript needs a value from the object that is to be compared. Objects can have properties (key and value pairs) and methods (an object property having a function definition as a value). key(name of the variable) and value separated by using a colon. In JavaScript, Objects are used to store values in the form of key: value pairs, i.e. Hence we get true in return as 5 is greater than 4. JavaScript converts the string '4' to a numeric 4 and then compares them. In the 1st example above, 5 is a numeric value while '4' is a string value. In the below-given examples, the operand on the left of the comparison operator is referred to as the first operand, and the operand on the right is referred to as the second operand. Note that the value that will be stored in these variables after the comparison is the boolean value(either true or false) as we have used comparison operators. We have declared variables and used comparison operators with two operands (here numbers) in those variables. It returns true if the operand on the left of it is (strictly) not equal to the operand on the right of it It returns true if the operand on the left of it is (loosely) not equal to the operand on the right of it It returns true if the operand on the left of it is (strictly)equal to the operand on the right of it It returns true if the operand on the left of it is (loosely)equal to the operand on the right of it It returns true if the operand on the left of it is less than or equal to the operand on the right of it It returns true if the operand on the left of it is greater than or equal to the operand on the right of it It returns true if the operand on the left of it is greater than the operand on the right of it
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