#Javascript does not equal code

#Javascript does not equal code

See the code below : var valueOne = 3 Ĭonsole.log('ValueOne and ValueTwo are the same') Ĭonsole.log('ValueOne and ValueTwo are NOT the same') Ĭan you guess the output? You may or may not be surprised, but these values are considered to be the same. On the other hand, the identity operator ( =) requires both data types to be the same, as a prerequisite. Remember when performing comparisons, the equality operator ( =) will attempt to make the data types the same before proceeding. The correct decision is based on knowledge that how actually they work? Let’s understand. Many developers do not understand the correct version they use in specific scenarios. We hope you understood how these equal signs work in JavaScript.If you have worked on javascript then you must have noticed these two operators to compare values. Equal Signs in JavaScript Table Overview Sign Note: Always use Triple Equals (=) and NOT Equals (!=) for comparisons.īelow is the table representation of all the compare signs explained above. In the above case, there is no conversion happened that’s why a straightforward answer to the above comparison is True. Let’s use the same example we have used for NOT Equals with Double Equals. NOT Equal does not convert type while comparing. Opposite of Triple Equals (=) is NOT Equal (!=), but the behavior is the same. That’s what we have expected from the comparison sign should do. Let’s see the same examples with Triple Equals, which we have used for Double Equals. Like Double Equals, they DON’T convert types while comparing values or objects. Triple Equals are best to use for comparisons. In the above case, number 20 gets converted into a string, and because we have used NOT Equals sign, the result (“20” != “20”) is False.ĭouble Equal (=) and NOT Equal (!=) have a better alternative. Let’s see the above example with NOT Equal (!=).Īs expected, it converts types, and that’s why the output is False, which is not right when we are comparing numbers with string. NOT Equals also converts type while comparing. Opposite of Double Equals (=) is NOT Equal (!=), but the behavior is the same.

If accidentally value gets changed, then it will be confusing. When we compare values or objects, we don’t want the type to get change. In the above case, it has converted the number to the string, and both values get matched (“20” = “20”), and eventually, the result is True.

When you use Double Equals, JavaScript attempts to convert types. Why? Let’s see in the below example.īut it is wrong! Because the left side value 20 is a number and right side value “20” is a string. Because Number 20 is matched.īUT, you should avoid using Double Equal Sign. Suppose, in the if statement, you want to compare two values or objects, then you can use Double Equal sign. Double Equals (=) in JavaScriptĭouble Equal sign is use for comparison. Single Equal sign CAN’T be use for comparison. In the same way, we have created a new Date() object and saved it into a variable named t. In the above code, you can see that the value 100 is stored in the amount variable using a single equal (=) sign. We use Single Equal sign to assign value to the variable or to initialize an object. In this article, we will explain you difference between these various types of equal signs. In JavaScript, any new learner or even an experienced programmer could get confused in these multiple types of equal signs.