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    Java if, if-else, if-else-if-Linux hint

    The usage of a management stream assertion is a quite common requirement for fixing any programming drawback. It’s primarily used to generate a selected output based mostly on the actual situation. This assertion makes the choice based mostly on the Boolean worth return by the assertion. The declaration of the if-else-if assertion is kind of much like different programming languages like C, C++, and many others. The makes use of of various ‘if’ statements in Java are defined on this tutorial.

    Several types of ‘if’ statements:

    Easy ‘if’ assertion:

    Syntax:

    if (conditional expression)

    It checks the conditional expression, and if the expression returns true, then a selected assertion(s) will execute in any other case, nothing will execute.

    ‘if-else’ assertion:

    Syntax:

    if (conditional expression)
    else

    If the conditional expression returns true, then a selected assertion(s) will execute in any other case different assertion(s) will execute.

    ‘if-else-if’ assertion:

    Syntax:

    if (conditional expression 1)
    else if(conditional expression 2)
    .
    .
    else if(conditional expression n)
    else
    assertion 1…n

    The above ‘if’ assertion can be referred to as the ‘if-else-if’ ladder. It checks the primary conditional expression, and if it returns false, then it should test the second conditional expression and so forth. If all conditional expressions return false, it executes the assertion(s) of else half.

    nested ‘if’ assertion:

    Syntax:

    if (conditional expression 1) {
    assertion 1…n
    if (conditional expression 1)
    else
    assertion 1…n
    }

    When any ‘if’ assertion is said inside one other if assertion, then it’s referred to as nested ‘if’. If the outer ‘if’ situation returns true, then it should test the interior ‘if’ situation and make choices based mostly on the return worth.

    Instance-1: Use of straightforward ‘if’ assertion

    The next code reveals the easy use of the ‘if’ assertion. The primary ‘if’ situation checks the worth of the quantity is greater than 50 or not. The second ‘if’ situation checks the size of a string is lower than 6 or not.

    public class if1 {

    public static void fundamental(String[] args) {
    //Declare a numeric worth
    int quantity = 50;

    //Verify the worth is extra 50 or not
    if(quantity > 50)

    //Declare a string worth
    String password = “1234”;

    //Verify the size of the string is much less then 6 or not
    if(password.size() < 6)

    System.out.print(“Password can’t be lower than 6 characters”);

    }

    }

    Output:

    The next output will seem after executing the code. Right here, the primary ‘if’ situation returned false, and no message is printed. The second ‘if’ situation returned true, and a message is printed.

    Instance-2: Use of ‘if-else’ assertion

    The next code reveals the usage of the ‘if-else’ assertion. On this code, an integer worth is taken from the person. If the enter worth is between 13 to 17, then ‘if’ situation will return true, a selected message will print in any other case one other message will print.

    //Import Scanner bundle
    import java.util.Scanner;
    public class if2 {

    public static void fundamental(String[] args) {

    // Create a Scanner object
    Scanner enter = new Scanner(System.in);

    System.out.print(“Kind your age : “);

    // Take numeric knowledge from the person
    int age = enter.nextInt();

    // Verify the enter worth is throughout the vary 13-17 or not
    if(age >= 13 && age <18)

    System.out.print(“You’re a teenager”);

    else

    System.out.print(“You aren’t an adolescent”);
    //Shut the scanner object
    enter.shut()

    }
    }

    Output:

    The next output will seem after executing the code. Right here, 15 is taken as enter, and the next output is printed as a result of if situation returned true.

    Instance-3: Use of ‘if-else-if’ assertion

    The usage of the ‘if-else-if’ assertion is proven within the following instance. Right here, a string worth can be taken as enter from the person. The primary ‘if’ situation will test the enter worth, and if it returns false, then the worth will test by the following ‘if’ situation and so forth. The message of the else half will print if all ‘if’ circumstances return false.

    //Import Scanner bundle
    import java.util.Scanner;
    public class if3 {

    public static void fundamental(String[] args) {

    // Create a Scanner object
    Scanner in = new Scanner(System.in);
    System.out.print(“Enter your title : “);

    // Take string knowledge from the person
    String title = in.subsequent();

    // Verify the enter worth equal to ‘Jolly’ or not
    if(title.equals(“Jolly”))

    // Verify the enter worth equal to ‘Janifer’ or not
    else if(title.equals(“Janifer”))

    System.out.print(“You have got achieved the second worth”);

    // Verify the enter worth equal to ‘Jony’ or not
    else if(title.equals(“Jony”))

    System.out.print(“You have got achieved the third worth”);

    else

    System.out.print(“Strive for subsequent time”);

    //Shut the scanner object
    in.shut();

    }

    }

    Output:

    The next output will seem after executing the code. Right here, ‘Janifer’ is taken as enter from the person.

    Instance-4: Use of nested ‘if’ assertion

    The usage of nested ‘if’ assertion is proven within the following instance. Two enter values can be taken from the person. If the worth of gender matches with the outer ‘if’ situation, then it should test the worth of age within the interior ‘if’ situation. The output will print based mostly on the return worth of the ‘if’ situation.

    //Import Scanner bundle
    import java.util.Scanner;
    public class if4 {

    public static void fundamental(String[] args) {

    // Create a Scanner object
    Scanner in = new Scanner(System.in);

    System.out.print(“Enter your gender : “);
    // Take string knowledge from the person
    String gender = in.subsequent();

    System.out.print(“Enter your age : “);
    // Take numeric knowledge from the person
    int age = in.nextInt();

    // Verify the gender is the same as ‘male’ or not
    if(gender.equals(“male”))
    {
    // Verify the age is larger than 30 or not
    if(age > 30)

    else

    System.out.print(“You might be in Group 2”);

    }
    else

    System.out.print(“You might be in Group 3”);

    //Shut the scanner object
    in.shut();
    }
    }

    Output:

    The next output will seem after executing the code. Right here, ‘male’ is taken as gender, and 25 is taken as age values.

    Conclusion:

    The 4 completely different makes use of of ‘if’ statements are defined on this tutorial by utilizing easy examples. This tutorial will assist the brand new programmers to be taught the idea of a conditional assertion in Java from the fundamentals.

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