Java Control Statements

Control statements in Java are used to control the flow of execution in a program. They allow you to conditionally execute code blocks, loop over code blocks, and alter the flow of execution based on conditions.

if-else Statement

The if-else statement is used to execute a block of code if a condition is true, and another block of code if the condition is false.

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

Switch Statement

The switch statement allows a variable to be tested for equality against a list of values. Each value is called a case, and the code block corresponding to the matching case is executed.

int day = 3;
String dayString;
switch (day) {
    case 1:
        dayString = "Monday";
        break;
    case 2:
        dayString = "Tuesday";
        break;
    // Add more cases as needed
    default:
        dayString = "Invalid day";
}
System.out.println(dayString);

for Loop

The for loop is used to iterate a block of code a fixed number of times.

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

while Loop

The while loop is used to iterate a block of code as long as a condition is true.

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