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Nested if and Multi-Way if-else Statements

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Nested if and Multi-Way if-else Statements:           An if statement can be nested inside another if statement, forming a nested if statement. This allows for more complex decision-making in a program.           In a nested if statement, an if statement is placed inside another if statement. The inner if statement is considered to be nested within the outer if statement. There is no limit to the depth of nesting and an inner if statement can also contain another if statement.           Here is an example of a nested if statement: if (i > k) {     if (j > k)         System.out.println("i and j are greater than k"); } else {     System.out.println("i is less than or equal to k"); }           In this example, the inner if statement ` if (j > k) ` is nested inside the outer if statement ` if (i > k) `. This allows for di...
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Evaluating Expressions and operator Precedence

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 Evaluating Expressions and operator Precedence:           Java expressions follow the same evaluation rules as arithmetic expressions. When writing a numeric expression in Java, you can directly translate the arithmetic expression using Java operators.           For example, consider the arithmetic expression: (3 + 4x /5 )- (10(y - 5)(a + b + c) / x) + 9((4/x) + (9 + x)y)            This can be translated into a Java expression as: (3 + 4 * x) / 5 - 10 * (y - 5) * (a + b + c) / x + 9 * (4 / x + (9 + x) / y)           While Java has its own internal mechanism for evaluating expressions, the result of a Java expression and its corresponding arithmetic expression is the same. Therefore, you can safely apply the arithmetic rules for evaluating a Java expression. Operators enclosed within parentheses are evaluated first, and nested parentheses are evaluated from ...
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Named constants and naming conventions

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Named constants:           During the execution of a program, the value of a variable can be altered, whereas a named constant, or simply a constant, represents data that remains unchanged permanently. In our "ComputeArea" program, the constant "PI" retains its value consistently. To avoid repeatedly typing the value "3.14159" for "PI," it is possible to declare a constant for it. The following syntax is used to declare a constant: final datatype CONSTANTNAME = value;           A constant must be declared and initialized in the same statement. The keyword " final " in Java is used to declare a constant. For example, "PI" can be declared as a constant.           The code for the "ComputeAreaWithConstant"   import java.util.Scanner; public class ComputeAreaWithConstant {     public static void main(String[] args) {         final double PI = 3.14159; // Declare a con...
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Nested if and Multi-Way if-else Statements

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Nested if and Multi-Way if-else Statements:           An if statement can be nested inside another if statement, forming a nested if statement. This allows for more complex decision-making in a program.           In a nested if statement, an if statement is placed inside another if statement. The inner if statement is considered to be nested within the outer if statement. There is no limit to the depth of nesting and an inner if statement can also contain another if statement.           Here is an example of a nested if statement: if (i > k) {     if (j > k)         System.out.println("i and j are greater than k"); } else {     System.out.println("i is less than or equal to k"); }           In this example, the inner if statement ` if (j > k) ` is nested inside the outer if statement ` if (i > k) `. This allows for di...
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Numeric Data Types , Operations and Literals

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 Numeric Data Types :                     Each data type in Java has a specific range of values associated with it. When you declare a variable or constant, the compiler sets aside memory space based on its data type. Java offers eight primitive data types that cater to numeric values, characters, and Boolean values. In this section, we will focus on introducing numeric data types and the operators used with them.           Table-1 lists the six numeric data types, their ranges, and their storage sizes. Table-1           In Java, there are four types available for representing integers: byte, short, int, and long. It is important to choose the appropriate type based on the range of values your variable needs to hold. For instance, if you know that an integer will always fall within the range of a byte, it is recommended to declare the variable as a byte to optimiz...
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