Control statements in java with examples ppt free download

Control statements in java with examples ppt free download

I'll respond in English as per your request.

Control Statements in Java

Control statements in Java are used to control the flow of a program's execution. They are used to specify the order in which instructions should be executed and to provide alternative paths for the program to follow.

Here are some common types of control statements in Java:

The if-else statement is used to execute different blocks of code based on whether a certain condition is true or false. The syntax for an if-else statement is as follows:

if (condition) {
// code to be executed if the condition is true
} else {
// code to be executed if the condition is false
}

Example:

int x = 10;
if (x > 5) {
System.out.println("x is greater than 5");
} else {
System.out.println("x is less than or equal to 5");
}

Output: x is greater than 5

The switch statement is used to execute different blocks of code based on the value of an expression. The syntax for a switch statement is as follows:

switch (expression) {
case value1:
// code to be executed if the expression has the value value1
break;
case value2:
// code to be executed if the expression has the value value2
break;
default:
// code to be executed if the expression does not match any of the values
break;
}

Example:

int day = 3;
switch (day) {
case 1:
System.out.println("Monday");
break;
case 2:
System.out.println("Tuesday");
break;
case 3:
System.out.println("Wednesday");
break;
default:
System.out.println("Invalid day");
break;
}

Output: Wednesday

The for loop is used to execute a block of code repeatedly for a specified number of times. The syntax for a for loop is as follows:

for (initialization; condition; increment) {
// code to be executed
}

Example:

for (int i = 1; i <= 5; i++) {
System.out.println(i);
}

Output: 1, 2, 3, 4, 5

The while loop is used to execute a block of code repeatedly as long as a specified condition is true. The syntax for a while loop is as follows:

while (condition) {
// code to be executed
}

Example:

int i = 1;
while (i <= 5) {
System.out.println(i);
i++;
}

Output: 1, 2, 3, 4, 5

The do-while loop is used to execute a block of code repeatedly as long as a specified condition is true. The syntax for a do-while loop is as follows:

do {
// code to be executed
} while (condition);

Example:

int i = 1;
do {
System.out.println(i);
i++;
} while (i <= 5);

Output: 1, 2, 3, 4, 5

The break statement is used to exit a loop or switch statement. The syntax for the break statement is as follows:

break;

Example:

for (int i = 1; i <= 5; i++) {
if (i == 3) {
break;
}
System.out.println(i);
}

Output: 1, 2

The continue statement is used to skip the current iteration of a loop. The syntax for the continue statement is as follows:

continue;

Example:

for (int i = 1; i <= 5; i++) {
if (i == 3) {
continue;
}
System.out.println(i);
}

Output: 1, 2, 4, 5

The jump statements in Java are used to transfer the control of a program from one point to another.

The return statement is used to exit a method and return a value. The syntax for the return statement is as follows:

return value;

Example:

public int add(int x, int y) {
return x + y;
}

Output: the sum of two integers passed to the method

The throw statement is used to throw an exception. The syntax for the throw statement is as follows:

throw new Exception("error message");

Example:

public void validateInput(String input) {
if (input == null || input.length() == 0) {
throw new NullPointerException("Invalid input");
}
}

Output: an exception is thrown with the error message "Invalid input"

The try-catch statement is used to catch and handle exceptions. The syntax for the try-catch statement is as follows:

try {
// code that may throw an exception
} catch (Exception e) {
// code to be executed when an exception is thrown
}

Example:

public void divide(int x, int y) {
try {
int result = x / y;
System.out.println(result);
} catch (ArithmeticException e) {
System.out.println("Error: Division by zero");
}
}

Output: the quotient of two integers or an error message if the denominator is zero

The finally block is used to specify code that should be executed regardless of whether an exception was thrown or not. The syntax for the finally block is as follows:

try {
// code that may throw an exception
} catch (Exception e) {
// code to be executed when an exception is thrown
} finally {
// code to be executed regardless of whether an exception was thrown or not
}

Example:

public void processFile(String filename) {
try {
File file = new File(filename);
FileReader reader = new FileReader(file);
// read the file
} catch (FileNotFoundException e) {
System.out.println("Error: File not found");
} finally {
if (reader != null) {
reader.close();
}
}
}

Output: an error message if the file is not found or the file is successfully processed

Control statements in Java are used to control the flow of a program's execution. They are used to specify the order in which instructions should be executed and to provide alternative paths for the program to follow. The common types of control statements in Java are if-else, switch, for loop, while loop, do-while loop, break, continue, return, throw, try-catch, and finally.

I hope this helps! Let me know if you have any questions or need further clarification.

Download the PPT:

You can download a free PowerPoint presentation on control statements in Java from here:

[Insert link to download]

Note that the presentation is for educational purposes only and should not be used for commercial purposes.

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:

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:

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:

In summary:

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.