if, else if, else

Week 1: Types, condition clauses and loops/8a. Condition clauses

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+// eg1
+// user input > 100?
+import java.util.Scanner;
+
+// 3 blocks
+// 1 class definition / define class
+// 2 define 'main' method
+// 3 within 'condition clause'
+public class Example {
+    public static void main(String[] args) {
+        Scanner reader = new Scanner(System.in);
+        
+        System.out.print("Give a number: ");
+        int num = Integer.valueOf(reader.nextLine());
+
+        if (num > 100) {
+            System.out.println("Number was greater than 100.");
+        }
+
+    }
+}
+
+
+
+
+
+
+
+
+// eg2
+// else
+import java.util.Scanner;
+
+public class Example {
+    public static void main(String[] args) {
+        Scanner reader = new Scanner(System.in);
+        
+        System.out.print("Give a number: ");
+        int num = Integer.valueOf(reader.nextLine());
+
+        if (num > 100){
+            System.out.println("Number was greater than 100.");
+        } else {
+            System.out.println("Number was lesser than or equal to 100.");
+        }
+    }
+}
+Example output:
+Give a number: 54
+Number was lesser than or equal to 100.
+
+
+
+
+
+
+
+// eg3
+// else if
+import java.util.Scanner;
+
+public class Example {
+    public static void main(String[] args) {
+        Scanner reader = new Scanner(System.in);
+        
+        System.out.print("Give a number: ");
+        int num = Integer.valueOf(reader.nextLine());
+
+        if (num < 0){
+            System.out.println("Number was negative.");
+        } else if (num > 0) {
+            System.out.println("Number was positive.");
+        } else {
+            System.out.println("Number was zero.");
+        }
+    }
+}
+Example output:
+
+Give a number: 15
+The number was positive.
+
+
+
+
+
+