Typically they will use with ordinally comparable values like numbers. The >, = and <= operators are used for inequality. Same goes for these != and != operators as well. The difference between = and = is usually characterized that = checks for value equality comparison and = checks for both value and type equality. There are four type of equality operators: =, =, != and !=.

It’s important to remember that a non- boolean value only follows this “truthy/falsy” coercion if it’s actually coerced to boolean. The specific list of “falsy” values in Javascript is as follows:Īny value that is not in the “falsy” list is “truthy”. Explicit coercion var x = '12' var y = Number (x ) typeof x // 'string' typeof y // 'number' // Implicit coercion var a = '12' var b = a * 2

Explicit coercion is simply that you can see obviously from the code that conversion from one type to another will occur, whereas the implicit coercion is when one type conversion happens as more of a non-obvious side effect of some other operation. CoercionĬoercion comes in two forms in Javascript: explicit and implicit. The result of any comparison is strictly boolean value ( true and false), regardless of what value types are being compared. There are two types of value comparison that you need to make in your JS programs: equality and inequality. As for number type we have Number object wrapper and the same goes for other types. The “how” behind being able to a.toUpperCase() is more complicated than just method existing on the value.īriefly, there is a String object wrapper form, typically called a native, that pair with primitive string type it’s this object wrapper that defines the toUpperCase() method on its prototype.

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