A conditional statement is also used to maintain data flow or program flow in javascript. A statement is any command or sentence that the JavaScript engine can execute to make something happen or cause some of its side effects. It is very helpful and useful in making conditional decisions based on our program. Javascript can also create a network-centric application.įocusing on our topic, the conditional statement is a very important part of the syntax of programming language. Earlier javascript was known as LiveScript.
It also has object-oriented capabilities. Under the function variable comes the conditional statement in javascript. Commonly used javascript variables are numbers, string, object, array, and function. Not only this but it is also used to manipulate html and css. It is basically used to manipulate, validate and calculate data. Javascript is a commonly used lightweight open-source computer programming language used to design part of web pages for the interaction of the client to the server or from the server to the client.
If the value on the left of the || does not equal to zero, false, null undefined, or an empty string, then the value on the left will be assigned to the variable.Īlthough the value on the left can be an undefined value for JS to evaluate the condition but the variable has to be declared otherwise an exception will be produced.Introduction to Conditional Statements in JavaScript Method 2: In this method, if the value of the left of the || is equal to zero, false, null, undefined, or an empty string, then the value on the right will be assigned to the variable.
Var b = a > 0? (a = 1? "A is 1" : "A is not 1") : (a = 0? "A is zero" : "A is negative") Nesting example of method 1: Change variable A value to 0, 1, 2 and a negative value to see how the statement would produce the result. You can also nest many conditions into one statement. If the condition evaluates to false the condition on the right will be assigned to the variable. Method 1: If the condition evaluates to true, the value on the left side of the column would be assigned to the variable. There are two methods I know of that you can declare a variable's value by conditions.
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