Conditional Statements Examples

src/Notes/Conditional Statements

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+Java Conditional Statements – Study Material
+Overview
+This session covers Java conditional statements, a key concept used to control the flow of execution in Java programs based on certain conditions. These are crucial when automating test cases using Selenium.
+
+Types of Conditional Statements in Java
+1. if Statement
+Syntax:
+
+ java
+CopyEdit
+if (condition) {
+    // code to execute if condition is true
+}
+
+
+Usage: Executes a block only if the condition is true.
+
+
+2. if-else Statement
+Syntax:
+
+ java
+CopyEdit
+if (condition) {
+    // true block
+} else {
+    // false block
+}
+
+
+Usage: Provides an alternate block of code if the condition is false.
+
+
+3. if-else-if Ladder
+Syntax:
+
+ java
+CopyEdit
+if (condition1) {
+    // block 1
+} else if (condition2) {
+    // block 2
+} else {
+    // default block
+}
+
+
+Usage: Checks multiple conditions sequentially.
+
+
+4. Nested if
+Usage: if statement inside another if block.
+
+
+Allows more complex decision structures.
+
+
+
+Switch Statement
+Syntax:
+
+ java
+CopyEdit
+switch (expression) {
+    case value1:
+        // code block
+        break;
+    case value2:
+        // code block
+        break;
+    default:
+        // default block
+}
+
+
+Usage: Best used when evaluating one variable against many possible constant values.
+
+
+Limitations: Works only with byte, short, char, int, enum, and String (Java 7+).
+
+
+
+Comparison and Logical Operators
+Used in condition checks:
+Comparison Operators: ==, !=, <, >, <=, >=
+
+
+Logical Operators: && (AND), || (OR), ! (NOT)
+
+
+
+Practical Examples
+Age Validation: Check if a user is eligible to vote.
+
+
+Grade System: Use of if-else-if ladder to assign grades.
+
+
+Menu Selection: Switch case to select options like login, register, etc.
+
+
+
+Key Points
+Conditional statements allow branching logic in programs.
+
+
+Use if when there's only one condition.
+
+
+Use switch for cleaner code when checking a single variable against multiple constants.
+
+
+Always test boundary conditions.
+

src/controlStatements/IfCondition4.java

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+package controlStatements;
+
+public class IfCondition4 {
+
+	public static void main(String[] args) {
+		//Smallest of numbers
+
+		 int a = 10, b = 20, c = 30;
+
+	        if (a <= b && a <= c) {
+	            System.out.println("Smallest number is: " + a);
+	        } else if (b <= a && b <= c) {
+	            System.out.println("Smallest number is: " + b);
+	        } else {
+	            System.out.println("Smallest number is: " + c);
+	        }
+
+	}
+
+}

src/controlStatements/IfCondition5.java

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+package controlStatements;
+
+
+public class IfCondition5 {
+
+	public static void main(String[] args) {
+		//Two Largest Numbers
+
+		 int a = 10, b = 20, c = 30;
+
+	        if (a >= b && a >= c) {
+	            if (b >= c) {
+	                System.out.println("Two largest numbers: " + a + " and " + b);
+	            } else {
+	                System.out.println("Two largest numbers: " + a + " and " + c);
+	            }
+	        } else if (b >= a && b >= c) {
+	            if (a >= c) {
+	                System.out.println("Two largest numbers: " + b + " and " + a);
+	            } else {
+	                System.out.println("Two largest numbers: " + b + " and " + c);
+	            }
+	        } else {
+	            if (a >= b) {
+	                System.out.println("Two largest numbers: " + c + " and " + a);
+	            } else {
+	                System.out.println("Two largest numbers: " + c + " and " + b);
+	            }
+	        }
+	}
+
+}

src/controlStatements/SwitchCase.java

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+package controlStatements;
+
+public class SwitchCase {
+
+	public static void main(String[] args) {
+
+		int weekno=1;
+		switch(weekno)
+		{
+		case 1: System.out.println("Sunday");
+		break;		
+		case 2: System.out.println("Monday");
+		break;
+		case 3: System.out.println("Tuesday");
+		break;
+		case 4: System.out.println("Wednesday");
+		break;
+		case 5: System.out.println("Thursday");
+		break;
+		case 6: System.out.println("Friday");
+		break;
+		case 7: System.out.println("Saturday");
+		default: System.out.println("Invalid week");
+		}
+
+
+
+	}
+
+}

src/controlStatements/SwitchCase1.java

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+package controlStatements;
+
+public class SwitchCase1 {
+
+	public static void main(String[] args) {
+
+		String weekName="Sunday";
+
+		switch(weekName)
+		{
+		case "Sunday": System.out.println(1);
+		break;
+		case "Monday": System.out.println(2);
+		break;
+		case "Tuesday": System.out.println(3);
+		break;
+		case "Wednesday": System.out.println(4);
+		break;
+		case "Thursday": System.out.println(5);
+		break;
+		case "Friday": System.out.println(6);
+		break;
+		case "Saturday": System.out.println(7);
+		default : System.out.println("invalid Week");
+		}
+
+	}
+
+}

src/controlStatements/TwoLargestNumbersWithTernary.java

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+package controlStatements;
+
+public class TwoLargestNumbersWithTernary {
+
+	public static void main(String[] args) {
+
+		int a=10, b=20, c=30;
+
+		int largest = (a >=b && a>=c) ? a:(b >=a && b>=c) ? b:c;
+
+		int secondLargest = (largest == a) ? (b>=c?b:c) : (largest == b) ? (a>=c?a:c) : (a>=b?a:b);
+
+		System.out.println("Two LArgest Numbers: "+largest+ "and"+secondLargest);
+
+	}
+
+}
+
+/*  Explanation:
+
+		Finding the largest:
+
+		int largest = (a >= b && a >= c) ? a : (b >= a && b >= c) ? b : c;
+
+		Checks if a is the largest.
+
+		If not, checks if b is the largest.
+
+		Otherwise, c must be the largest.
+
+		Finding the second largest:
+
+		int secondLargest = (largest == a) ? (b >= c ? b : c) :
+		                    (largest == b) ? (a >= c ? a : c) :
+		                    (a >= b ? a : b);
+
+		Based on who the largest is, compares the other two to find the second largest.
+
+		Printing the result:
+
+
+		System.out.println("Two largest numbers: " + largest + " and " + secondLargest);
+
+		✅ Output for a = 10, b = 20, c = 30:
+
+
+		Two largest numbers: 30 and 20
+
+*/