Conditional statements
Conditional statements in Java are essential programming constructs that enable the execution of different code blocks based on certain conditions. These statements control the flow of the program by allowing it to make decisions at runtime. The primary purpose of conditional statements is to add flexibility and interactivity to a program's logic.
Using conditional statements, developers can create programs that respond to changing circumstances. These statements evaluate a given condition or expression, and if the condition is true, a specific block of code is executed. If the condition is false, the code block may be skipped or an alternative block of code may be executed.
Conditional statements are especially valuable for creating dynamic and user-responsive applications. They allow programs to tailor their behavior based on user input, data values, or other runtime factors. This adaptability enhances the user experience and enables developers to handle various scenarios gracefully.
A conditional statement is a programming construct that allows the execution of code to be determined by the value of a condition. Conditional statements are used to make decisions in code, such as whether to perform an action or not.
There are three main types of conditional statements in Java:
If statement: The if statement is the simplest type of conditional statement. It allows you to execute a block of code if a condition is true.
Else statement: The else statement is used to execute a block of code if the condition in the if statement is false.
Else if statement: The else if statement is used to execute a block of code if a condition is true, but only if the condition in the if statement is false.
Here is an example of an if statement:
Java - If condition example
public class Main{
public static void main(String Args[]){
int mark=88;
if (mark >= 70) {
System.out.println("You are Pass.");
}
}
}
Output
You are Pass.
In this code, the if statement checks if the value of the variable mark is greater than or equal to 70. If it is, then the System.out.println() statement is executed.
Here is an example of an else statement:
Java -if else example
public class Main{
public static void main(String Args[]){
int age=38;
if (age < 70) {
System.out.println("You are not Qualified.");
} else {
System.out.println("You are Qualified.");
}
}
}
Output
You are not Qualified.
In this code, the if statement checks if the value of the variable mark is less than 70. If it is, then the System.out.println() statement is executed. Otherwise, the else statement is executed.
Here is an example of an else if statement:
Java - else if condition example
public class Main{
public static void main(String Args[]){
int age=17;
if (age < 13) {
System.out.println("You are a child.");
} else if (age >= 13 && age < 18) {
System.out.println("You are a teenager.");
} else {
System.out.println("You are an adult.");
}
}
}
Output
You are a teenager.
In this code, the if statement checks if the value of the variable age is less than 13. If it is, then the System.out.println() statement is executed. Otherwise, the else if statement is executed. The else if statement checks if the value of the variable age is greater than or equal to 13 and less than 70. If it is, then the System.out.println() statement is executed. Otherwise, the else statement is executed.
Conditional statements can be nested, which means that you can have an if statement inside another if statement.
Here is an example of a nested if statement:
Java - nested if else example
public class Main{
public static void main(String Args[]){
int age=27;
if (age < 18) {
if (age < 13) {
System.out.println("You are a child.");
} else {
System.out.println("You are a teenager.");
}
} else {
System.out.println("You are an adult.");
}
}
}
Output
You are an adult.
In this code, the first if statement checks if the value of the variable age is less than 70. If it is, then the second if statement is executed. The second if statement checks if the value of the variable age is less than 13. If it is, then the System.out.println() statement is executed. Otherwise, the else statement is executed.
It is important to understand how conditional statements work in Java. By understanding these concepts, you can write code that can make decisions based on the value of data.
Here are some additional details about conditional statements in Java:
Conditional statements can be used to make decisions about the flow of execution.
Conditional statements can be nested to make more complex decisions.
Conditional statements can be used to control the execution of loops.
It is important to use conditional statements in a way that is clear and understandable. By following these tips, you can write code that is easy to read and maintain.
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