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src/main/java/com/mycompany/proj/App.java

@@ -0,0 +1,24 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ */
+
+package com.mycompany.proj;
+
+import java.util.Scanner;
+
+/**
+ *
+ * @author 250421
+ */
+public class App {
+
+    public static void main(String[] args) {
+       Scanner scanner= new Scanner (System.in); 
+System.out.println( "Introduza um nuemro positvo")  ;
+ int numero = scanner.nextInt(); 
+while( numero < 0 ){ 
+System.out.println("introduza um numero positivo"); 
+numero = scanner.nextInt();    
+    }
+    }
+}