Control statements in java with examples ppt download
Control statements in java with examples ppt download
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Control Statements in Java
In programming languages like Java, control statements are used to regulate the flow of a program's execution based on conditions or loops. These statements help control the order and repetition of instructions in your code.
Let's explore some basic control statements in Java with examples:
The if-else statement is used to execute different blocks of code depending on whether a condition is true or false.
if (condition) {
// code to be executed when condition is true
} else {
// code to be executed when condition is false
}
Example: Guessing Game
import java.util.Scanner;
public class GuessingGame {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int secretNumber = 10;
System.out.println("Guess a number between 1 and 20:");
int guess = scanner.nextInt();
if (guess == secretNumber) {
System.out.println("Congratulations! You guessed correctly!");
} else if (guess < secretNumber) {
System.out.println("Too low. Try again.");
} else {
System.out.println("Too high. Try again.");
}
}
}
The for loop is used to iterate over a block of code for a specified number of iterations.
for (initialization; condition; increment) {
// code to be executed
}
Example: Printing Numbers 1-10
public class PrintNumbers {
public static void main(String[] args) {
for (int i = 1; i <= 10; i++) {
System.out.println(i);
}
}
}
The while loop is used to execute a block of code as long as a condition is true.
while (condition) {
// code to be executed
}
Example: Counting Down from 10
public class Countdown {
public static void main(String[] args) {
int count = 10;
while (count > 0) {
System.out.println(count);
count--;
}
}
}
The do-while loop is used to execute a block of code at least once before checking the condition.
do {
// code to be executed
} while (condition);
Example: Guessing Game (continued)
public class DoWhileGuessingGame {
public static void main(String[] args) {
int secretNumber = 10;
System.out.println("Guess a number between 1 and 20:");
Scanner scanner = new Scanner(System.in);
int guess;
do {
guess = scanner.nextInt();
if (guess == secretNumber) {
System.out.println("Congratulations! You guessed correctly!");
} else if (guess < secretNumber) {
System.out.println("Too low. Try again.");
} else {
System.out.println("Too high. Try again.");
}
} while (guess != secretNumber);
}
}
These control statements are essential in Java programming and can help you create more complex logic and decision-making processes in your code.
You can download the PPT file containing these examples by clicking the following link:
Control Statements in Java with Examples
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What is the difference between control statement and conditional statement in Java?
In Java, both control statements and conditional statements are used to dictate the flow of a program's execution, but they serve distinct purposes.
Control Statements:
Control statements in Java are used to transfer control between different parts of the code. They determine the order in which the statements within a block or method are executed. The five primary control statements in Java are:
Break: Used to exit a loop prematurely. Continue: Used to skip the current iteration and move on to the next one. Return: Used to terminate the execution of a method. Goto: Used to jump to a specific label within a method. Yield: Used to give up control and allow other threads or tasks to run (Java 7 onwards).Control statements do not make decisions based on conditions; instead, they influence the flow of your code by controlling where execution begins, ends, or jumps to.
Conditional Statements:
Conditional statements in Java are used to execute a specific block of code only when a certain condition is met. They evaluate a boolean expression and take action accordingly. The primary conditional statements in Java are:
If-else: Used to test a condition and execute one of two blocks of code depending on its outcome. Switch: Used to evaluate an expression against multiple possible values and execute corresponding blocks of code.Conditional statements make decisions based on conditions, which can be essential for making informed choices within your program. They help you implement logic that responds differently to various situations.
Key differences:
Purpose: Control statements control the flow of your code by transferring control between different parts. Conditional statements evaluate conditions and execute code accordingly. Logic: Control statements do not involve conditional logic, while conditional statements rely on evaluating boolean expressions. Scope: Control statements can be used within any block or method, whereas conditional statements typically apply to the surrounding scope. Decision-making: Conditional statements make decisions based on conditions, whereas control statements execute code without making explicit decisions.In summary:
Control statements dictate the flow of your code, influencing where execution begins, ends, or jumps to. Conditional statements evaluate boolean expressions and execute code accordingly, enabling decision-making within your program.When choosing between control statements and conditional statements in Java, consider the specific requirements of your program. Use control statements to transfer control between different parts of your code, and use conditional statements to make decisions based on conditions.
