Key Differences Between if-else and switch Expression inside if statement decide whether to execute the statements inside if block or under else block. On the other hand, expression inside switch statement decide which case to execute. You can have multiple if statement for multiple choice of statements.
Keeping this in view, what is the difference between switch and if statement in Java?
The if statement is used to select among two alternatives. It uses a boolean expression to decide which of the alternative should be executed. The switch statement is used to select among multiple alternatives. It uses an expression to determine which alternative should be executed.
Subsequently, question is, can we use if else in switch case?
Switch with if, else if, else, and loops inside case. Let's say value is currently 1, we go to case 1 and our for loop goes through the array to see if each element matches with the whatever_value variable. In this case if it does, we declare the value variable to be equal to 2, and we break out of the loop.
Which is faster switch case or if else?
As it turns out, the switch statement is faster in most cases when compared to if-else , but significantly faster only when the number of conditions is large. The primary difference in performance between the two is that the incremental cost of an additional condition is larger for if-else than it is for switch .
Why is switch better than if else?
switch vs if else. A switch statement is usually more efficient than a set of nested ifs. The compiler can do this because it knows that the case constants are all the same type and simply must be compared for equality with the switch expression, while in case of if expressions, the compiler has no such knowledge.