BASIC JAVA-2

Conditional Statement

If-Else

Switch case

Break

Continue

Loop

For Loop

While Loop

Do While Loop

Conditional Statements:

Conditional statements allow us to execute different blocks of code based on certain conditions. In Java, we commonly use the if-else and switch-case statements.

If-Else Statement:

The if-else statement executes a block of code if a specified condition is true, and another block of code if the condition is false.

int num = 10;
if(num > 0) {
    System.out.println("Number is positive");
} else {
    System.out.println("Number is non-positive");
}

Switch-Case Statement:

The switch-case statement evaluates an expression and executes the corresponding block of code based on the value of the expression.

int day = 3;
switch(day) {
    case 1:
        System.out.println("Sunday");
        break;
    case 2:
        System.out.println("Monday");
        break;
    // Other cases
    default:
        System.out.println("Invalid day");
}

Loops:

Loops allow us to execute a block of code repeatedly until a specified condition is met. In Java, we have three types of loops: for, while, and do-while.

For Loop:

The for loop executes a block of code a specified number of times.

for(int i = 0; i < 5; i++) {
    System.out.println("Iteration: " + i);
}

While Loop:

The while loop executes a block of code as long as a specified condition is true.

int i = 0;
while(i < 5) {
    System.out.println("Iteration: " + i);
    i++;
}

Do-While Loop:

The do-while loop executes a block of code at least once, and then repeats the loop as long as a specified condition is true.

int i = 0;
do {
    System.out.println("Iteration: " + i);
    i++;
} while(i < 5);

Break and Continue:

In addition to loops and conditional statements, Java also provides break and continue statements for altering the flow of execution within loops.

Break Statement:

The break statement is used to terminate the loop or switch-case statement it is within.

for(int i = 0; i < 10; i++) {
    if(i == 5) {
        break; // Exit the loop when i reaches 5
    }
    System.out.println("Iteration: " + i);
}

Continue Statement:

The continue statement skips the current iteration of a loop and proceeds to the next iteration.

for(int i = 0; i < 5; i++) {
    if(i == 2) {
        continue; // Skip iteration when i equals 2
    }
    System.out.println("Iteration: " + i);
}

In summary, mastering conditional statements and loops in Java is crucial for writing efficient and organized code. These constructs, including if-else, switch-case, and various loop types, enable developers to control program flow and execute repetitive tasks effectively. The break and continue statements provide additional control within loops.

By understanding and applying these concepts, developers can create clearer and more maintainable code, enhancing their Java programming skills and ability to tackle diverse challenges. So, dive into these constructs, practice regularly, and elevate your Java development expertise.