Java Statements tutorial for Beginners

Here we will learn about statements in Java.

Types of Java Statement

  • Expression Statement
  • Control Statement
  • Assignment Statement

 In this section, we will discuss control statements. 


Control Statements

  • Conditional execution
  • Looping
  • Flow Control Statement

Types of Conditional Execution

  • If Statement
  • If – Else statement
  • If- Else-if statement
  • Switch statement

if Statement

The “if” statement in Java encloses a portion of code which is executed only if the applied condition is true. if statement only accept the boolean expression as a condition.

Unlike other languages Java does not accept numbers as conditional operators. It only considers boolean expressions as conditions that return TRUE or FALSE.

The syntax of If Statement

if (true)
   System.out.println("Hello! This will always get printed");
if (Boolean Expression) {
    Code block to get executed
}

Example code of If Statement

public class if_condition {
    public static void main(String[] args) {
        String string = "Hello";
        if ("Hello".equals(string)) {
            System.out.println("String has the Value Hello");
        }

        if ("Hi".equalsIgnoreCase(string)) {
            System.out.println("String has the value Hi");
        }
    }
}

If you run above code it will print “String has the Value Hello”.


If Else Statement

The if Else statement consists of one if condition and one else statement. It encloses a portion of code which is executed only if the if a condition is true if it is false then the else part of the code will be executed. If else statements take only boolean expression as valid conditions.

Unlike other languages, java does not accept numbers as conditional operators. It only considers boolean expressions as conditions that return TRUE or FALSE.
E.g if (1==1) is accepted as it is a boolean expression and will return true. if(x=1) statement is not allowed in Java.

Syntax of If  Else Statement

if (1==2)
	System.out.println("Hello! This will not get printed");
else
	System.out.println("Hello! This will get printed");
if (Boolean Expression) {
    Code block to get executed
}
else{
code block to get executed when above condition is false
}

Example code of If Else Statement

public class if_condition {
    public static void main(String[] args) {
        String string = "Hello";
        if ("Hello".equals(string)) {
            System.out.println("String has the Value Hello");
        } else {
            System.out.println("String is not Hi");
        }

        if ("HI".equals(string)) {
            System.out.println("String has the Value Hi");
        } else {
            System.out.println("String is not Hi");
        }
    }
}

When you run above code, it will print..

String has the Value Hello
String is not Hi

If Else If Statement

The if else if statement consists of multiple if conditions and an else statement. If the if condition is true then the enclosed code will be executed. If the if condition is false then it will check the next if condition. If the next if condition is true then the enclosed code will be executed otherwise the else part of the code will be executed. If Else If statements take only boolean expressions as a valid condition.

Unlike other languages java doesn’t accept numbers as conditional operators. It only considers boolean expressions as conditions that return TRUE or FALSE.
E.g If(x=1) is not allowed while if(1==1) is accepted as it is a boolean expression and will return true.

Syntax of If  Else If Statement

if (1==2)
	System.out.println("Hello! This will not get printed");
else if(1==1)
	System.out.println("Hello! This will get printed");
else
	System.out.println("This will get executed when Above conditio is FALSE");
if (Boolean Expression) {
    Code block to get executed
}
else{
code block to get executed when above condition is false
}

Example Code of If Else If Statement in java

public class if_condition {
    public static void main(String[] args) {
        String string = "Hello";

        if ("HI".equals(string)) {
            System.out.println("String has the Value Hi");
        } else if ("Hello".equals(string)) {
            System.out.println("String is not Hi");
        }

        string = "NotHello";
        if ("Hello".equals(string)) {
            System.out.println("String has the Value Hello");
        } else if ("Hi".equalsIgnoreCase(string)) {
            System.out.println("String is not Hi");
        } else {
            System.out.println("String is neither Hello nor Hi");
        }
    }
}

When you run above code, it will print..

String is not Hi
String is neither Hello nor Hi

Types of Looping Statement

  • For Loop
  • While Loop
  • Do  – While Loop

Types of Flow Control Statement

  • Return Statement
  • Continue Statement
  • Break Statement
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18 Comments Java Statements tutorial for Beginners

    1. Ramneet Singh Dua

      break: is used to stop execution of a loop
      continue: is used when we want the code execution irrespective of the condition
      return: is used to explicitly return from a method

      Reply
  1. surya

    Thanks for developing this site from which I can able to learn the concepts easily.

    Could you please provide the explanation for flow control statement and assignment statement with some examples for better understanding?

    Reply
  2. vikramadity........

    very nice explaintion……………….but i am not understand…..bsuz no problem……i am indian airforce….not depended…understood…yaaa qki mere dosto ko smj me aa gaya kafi hain…………..

    Reply

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