By using val when declaring class property without specifying any access modifiers, you basically tell compiler to generate "getter" method. In case of using var you tell it to generate "getter" and "setter", which means more code (you won't see it in a class body, it will be present in compiled code). val and var are about design, you want to In this article, we are going to discuss the differences between html (), text (), and val () methods and their usage. 1. jQuery html () method: The html () method is used to set or return the inner HTML of a selected element. It works similarly to innerHTML in normal JavaScript to set or get the content of the selected element. In the above examples, val y and def z return the same value. However, a def is evaluated when it is called, whereas a val or var is evaluated when it is assigned. This can result in differing behavior when the definition has side effects: scala> val a = {println ("Hi"); 1} Hi a: Int = 1 scala> def b = {println ("Hi"); 1} b: Int scala> a + 1 let works very much like var. The main difference is that the scope of a var variable is the entire enclosing function. This table on Wikipedia shows which browsers support Javascript 1.7. Note that only Mozilla and Chrome browsers support it. IE, Safari, and potentially others don't. set variable value does not assign a value to the variable variable, the syntax for that would be variable=value. What the set command does is to replace the parameters of the script (or function). When you run a script with arguments, these are available in the script in special variables that have a number rather than a name: $1, $2 Difference between val and var. Adding val before the variable declaration makes the variable read-only which means that once you define the variable and assign a value for the first time, you Practice. The var reserved type name (not a Java keyword) was introduced in Java 10. Type inference is used in var keyword in which it detects automatically the datatype of a variable based on the surrounding context. The below examples explain where var is used and also where you can’t use it. 1. We can declare any datatype with the var keyword. The difference between var and val is specified later on this page. Here, variable language is String type and variable salary is Int type. We don't require specifying the type of variable explicitly. Kotlin complier knows this by initilizer expression ("Java" is a String and 30000 is an Int value). This is called type inference in programming. Add a comment. 1. Statements are more imperative and expressions are more functional. If that is what you are looking for. Statements are like assignments and therefore, equated to "var" rather than "val" and they don't print out the values,you'll need a println (s"") to get the value out of them. This is a read-only value. var is a mutable value. const would on the other hand be not 100% correct. The value PI (3.14..) is a constant. Its value never changes. The value of x in this line val x = random.nextInt () will (hopefully) always be different, but you want the value not to be modified in the function. wVVoG.