Java If else

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Decision making structures helps to the programme evaluate one or more conditions in the program. If the condition is true it executes true statement otherwise it executes the false statement.

  • If Statement
  • If-else Statement
  • Nested If statement
  • Switch Statement
  • Nested Switch Statement
Java If else Flow

If Statement:-

The if statement has a Boolean expression which contains one or more statements. The if condition is true it executes true statement.

if(boolean_expression) {
  /* statements will execute if the boolean expression is true */
}

Example:-

public class If
{  
    public static void main(String []args) {  
        int a=10;
        if(a!=0)  
        {   
            System.out.println("Print the value of a "+a); 
        }
    }  
}
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If-else Statement:-

The if-else statement functions execute code statements if the test expression is true and some other code statements if the test expression is false.

Java If else Statement

Syntax:-

 if(boolean_expression) {
	/* statements will execute if the boolean expression is true */
}
else{
	/* statements will execute if the boolean expression is false */
}

Example

 public class Ifelse
{  
    public static void main(String []args) {  
        int a=10,b=15;
        if(a > b) {   
    		System.out.println("Print the value of a "+a); 
        }
        else{
            System.out.println("Print the value of b "+b); 
        }
	}  
}
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Nested If Statement:-

Nested If statement is used if or if-else inside another if or if-else.

Syntax:-

 if( boolean expression ) {
	/* statements will execute if the boolean expression is true */
   if(boolean expression 1) {
      /* statements will execute if the boolean expressionc 1 is true */
   }
}

Example:-

 public class Nestedif
{  
    public static void main(String []args) {  
        int a=12,b=7,c=5;
        if(a > b) {   
            if(a > c){
                System.out.println("Print the value of a "+a); 
            }
            else{
                System.out.println("Print the value of c "+c); 
            }
        }  
        else{
            if(b > c){
                System.out.println("Print the value of b "+b); 
            }
             else{
                System.out.println("Print the value of c "+c);  
             }
        }
	}  
}
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