If else statements without curly braces

• It is also correct without braces, if there is only one statement under the if / else condition.
• but if you have to put multiple statement under the if / else condition then you must provide braces, without braces if / else condition will only read first statement and output will be different from as you expected.

---

Scenario 1:

• Here, We have single statement under the if else condition.
• So, There is no error.

public class Practice6 {

	public static void main(String[] args) {
		int no = 3;

		if (no < 5)
			System.out.println("Line 1");

		else
			System.out.println("Line 2");

	}
}

Output:

Line 1

---

Scenario 2:

• Here, we have two statement under the if & also have single statement under the else.
• But, Compiler considered like:
  • Line 1 is If condition statement
  • Line 3 is else condition statement
  • Line 2 is outside of if else condition….
  • We mentioned Line 2 statement wrongly in between if else condition
  • So, Compiler throws an error.

public class Practice3 {

	public static void main(String[] args) {
		int no = 3;

		if (no < 5)
			System.out.println("Line 1");
		    System.out.println("Line 2");
		
		else
			System.out.println("Line 3");

	}
}

Output: Compilation error

error: Class names, ‘Practice3’, are only accepted if annotation processing is explicitly requested

---

Scenario 3:

• Here, we have put two statements under if condition.
• There is no another if or else conditions.
• Compiler considered like:
  • Line 1 is if condition statement.
  • Line 2 is outside of if condition.
  • So compiler prints Line 2 statement also.

public class Practice6 {

	public static void main(String[] args) {
		int no = 3;

		if (no < 5)
			System.out.println("Line 1");
		    System.out.println("Line 2");
	}
}

Output:

Line 1
Line 2

---

Scenario 4:

• Here, if condition have single statement & else condition have two statements.
• There is no conditions after else.
• So, Compiler thinks like
  • Line 2 is else condition statement.
  • Line 3 is outside of if else conditions.
  • So, it prints Line 3 statement also.

public class Practice6 {

	public static void main(String[] args) {
		int no = 6;

		if (no < 5)
			System.out.println("Line 1");
		
		else
			System.out.println("Line 2");
			System.out.println("Line 3");
	}
}

Output:

Line 2
Line 3

---

Scenario 5:

• Here, if condition have single statement.
• else if condition have two statements Line 2 & Line 3.
• Continuously we have else condition also.
• Compiler thinks like:
  • Line 2 is else if condition statement.
  • We have placed Line 3 Statement wrongly in between if else conditions.
  • So, it throws an error.

public class Practice3 {

	public static void main(String[] args) {
		int no = 6;

		if (no < 5)
			System.out.println("Line 1");
		
		else if(no > 10)
			System.out.println("Line 2");
			System.out.println("Line 3");
			
		else
			System.out.println("Line 4");
				
	}
}

Output: Compilation Error

error: Class names, ‘Practice3’, are only accepted if annotation processing is explicitly requested

---

Scenario 6:

• Here, if & else if condition have single statement.
• else condition have two statement. There is no more conditions after that.
• Compiler considered the Line 4 statement is the outside of if else conditions.
• So, compiler print Line 4 Statement.

public class Practice6 {

	public static void main(String[] args) {
		int no = 0;

		if (no < 5)
			System.out.println("Line 1");

		else if (no > 10)
			System.out.println("Line 2");

		else
			System.out.println("Line 3");
		    System.out.println("Line 4");
	}
}

Output:

Line 1
Line 4

---

NOTE:

Good coding practice is using braces for all conditional statements.

---