Just like any other programming language JavaScript also have conditional statements like if…else. Then we go to the next else if part and check whether age >= 10 and it is false again.So, we just print the statement in else part i.e.

Then we go to the next else if part and check whether age >= 15 and it is false again.

Now, in the if statement we check whether age >= 21 and it is false. In the above example, we initialize age to 9. These conditional statements are an essential part of programming as they have logic to execute two or more different set of statements.JavaScript supports the following form of if…else statements –if statementif…else statementif…else if…else statementif statementThe if statement in it’s a standalone avatar, will run a set of the statement contained inside its curly brackets to run if it evaluates to true.var age = 22 if(age >= 21) // You are still a babyWe have refactored the if statement code to run two else if part and one else part. It's the only one JavaScript currently has, though.JavaScript Tutorial By KnowledgeHut Just like any other programming language JavaScript also have conditional statements like if…else. They can even be chained: serveDrink(userIsYoungerThan4 ? 'Milk' : userIsYoungerThan21 ? 'Grape Juice' : 'Wine') īe careful, though, or you will end up with convoluted code like this: var k = a ? (b ? (c ? d : e) : (d ? e : f)) : f ? (g ? h : i) : j ġ Often called 'the ternary operator,' but in fact it's just a ternary operator. Like all expressions, the conditional operator can also be used as a standalone statement with side-effects, though this is unusual outside of minification: userIsYoungerThan21 ? serveGrapeJuice() : serveWine() ServeDrink(userIsYoungerThan21 ? 'Grape Juice' : 'Wine') This can be shortened with the ?: like so: var userType = userIsYoungerThan18 ? 'Minor' : 'Adult'

Here is an example of code that could be shortened with the conditional operator: var userType This is a one-line shorthand for an if-else statement.

Javascript if else