Create 17. Number triangle

Week 1: Types, condition clauses and loops/17. Number triangle

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+Write a program that asks the user to enter an integer.
+The program will then print a number triangle corresponding to the integer number according to the example printouts shown below.
+Example output:
+Give a number: 4
+1
+12
+123
+1234
+
+
+
+import java.util.Random;
+import java.util.Scanner;
+
+
+
+public class Test{
+    public static void main(String[] args){
+        final Random r = new Random();
+        
+        Scanner reader= new Scanner(System.in);
+        System.out.print("Give a number: ");
+        int user_num = Integer.valueOf(reader.nextLine());
+        
+        for (int row=1; row<=user_num; row++) {
+            
+            String rowprintout = "";
+            for (int col=1; col<=row; col++) {
+              rowprintout = rowprintout + col;
+            }
+
+            System.out.println(rowprintout);
+        }
+        
+    }
+}
+
+
+
+
+
+Testing with input 4
+Give a number: 4
+1
+12
+123
+1234
+
+Testing with input 6
+Give a number: 6
+1
+12
+123
+1234
+12345
+123456
+
+Testing with input 7
+Give a number: 7
+1
+12
+123
+1234
+12345
+123456
+1234567
+
+Testing with input 5
+Give a number: 5
+1
+12
+123
+1234
+12345
+
+Testing with input 1
+Give a number: 1
+1
+
+