Core Java Tutorial for Beginners Part -3 How to use Switch Case Statements #corejavatutorial
The switch statement in programming languages, including Java, is a control flow structure that provides an efficient way to handle multiple conditions or branches based on the value of a variable or expression. It is a cleaner alternative to using multiple if-else statements when there are several possible values to be checked.
switch (expression) {
case value1:
// Code to be executed if expression matches value1
break;
case value2:
// Code to be executed if expression matches value2
break;
// More cases as needed
default:
// Code to be executed if no case matches the expression
}
Key Components:
1. Expression: The variable or expression whose value is evaluated against each case label.
2. Cases: The individual branches inside the switch statement, labeled with case. When the value of the expression matches a case, the corresponding block of code is executed.
3. Break Statement: After the code in a case is executed, the break statement is used to exit the switch statement. Without it, the control would "fall through" to the next case.
4. Default Case: The default case is optional and is executed when none of the cases match the value of the expression. It is similar to the else statement in an if-else structure.
How it Works:
1. The expression inside the switch is evaluated.
2. The value of the expression is compared with each case label.
3. If a match is found, the corresponding code block is executed.
4. The break statement exits the switch statement, preventing fall-through to subsequent cases.
5. If no match is found, the code in the default case (if present) is executed.
Use Cases:
• Menu Selection: When handling user input for menu options.
• State Machines: Representing different states and their associated actions.
The switch statement is a powerful tool for writing concise and readable code, particularly in situations where multiple conditions need to be evaluated based on the value of a single expression.
Watch video Core Java Tutorial for Beginners Part -3 How to use Switch Case Statements #corejavatutorial online without registration, duration 21 minute 16 second in high hd quality. This video was added by user Create knowledge 11 January 2024, don't forget to share it with your friends and acquaintances, it has been viewed on our site 140 once and liked it 20 people.