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1. Company.Rivera & G
Autor: Santos Nilo Rivera Luján Mi Web: riverasn.p.ht
1
Bucles Repetitivos
Son aquellos que realizan instrucciones repetidas veces. Pueden ser condicionales o automática.
Tipos
I) Bucles ejecutados por el usuario
Son realizados por el mismo usuario
II) Bucles con sintaxis
 Bucles de entrada controlada
 Bucles de salida Controlada
 Bucles con contador automático
a) Bucles de entrada controlada
Do while <condición>
Instrucciones
[EXIT DO]
Loop
b) Bucles de salida controlada
Do
Instrucciones
[EXIT DO]
Loop while <condición>
c) Bucles con contador automtico
For Valor Inicial to Valor Final [Step #]
Instrucciones
[EXIT FOR]
Next
Contador
Se caracterizan por contar procesos y generar series
Características
Contador=Valor inicial (FUERA DEL BUCLE)
Contador=Contador+incremento fijo (DENTRO DEL BUCLE)
Acumulador
Se caracterizan por acumular valores
Características
Acumulador=Valor inicial (FUERA DEL BUCLE)
Acumulador=Acumulador + incremento variable (DENTRO DEL BUCLE)
Multiplicador
Se caracteriza por incrementarse geométricamente.
Características
Multiplicado=Valor Inicial (FUERA DEL BUCLE)

2. Company.Rivera & G
Autor: Santos Nilo Rivera Luján Mi Web: riverasn.p.ht
2Multiplicador=Multiplicador x Incremento multiple (DENTRO DEL BUCLE)
Ejemplo: Programa para generar la serie: 1 2 3 4 5
Public Class Frminicial
Private Sub Btnord_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Btnord.Click
Dim n As Integer = 0, cad As String = ""
Do While n < 5
n = n + 1
cad = cad + Str(n) + " "
Loop
Lbls.Text = cad
End Sub
Private Sub Btnord2_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Btnord2.Click
Dim n As Integer = 0, cad As String = ""
Do
n = n + 1
cad = cad + Str(n) + " "
Loop While n < 5
Lbls.Text = cad
End Sub
Private Sub Btnord3_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Btnord3.Click
Dim n As Integer, cad As String = ""
For n = 1 To 5
cad = cad + Str(n) + " "
Next
Lbls.Text = cad
End Sub
End Class

3. Company.Rivera & G
Autor: Santos Nilo Rivera Luján Mi Web: riverasn.p.ht
3
Desarrollar
Programa para generar la siguiente serie: 1 , 5 , 9 , 13 , 17
Public Class Form1
Private Sub Btnord_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Btnord.Click
Dim n As Integer
Dim cad As String = ""
For n = 1 To 17 Step 4
cad = cad + Str(n) + " "
Next
Lbls.Text = cad
End Sub
End Class
Programa para generar la siguiente serie : 10, 5, 0, -5, -10
Public Class Frm2
Private Sub Btnord_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Btnord.Click
Dim n As Integer
Dim cad As String = ""
For n = 3 To 11 Step 2
cad = cad + Str(n) + "/" + Str(n + 2) + " "
Next
Lbls.Text = cad
End Sub
End Class

4. Company.Rivera & G
Autor: Santos Nilo Rivera Luján Mi Web: riverasn.p.ht
4
Programa para generar la serie: 3/5 5/7 7/9 9/11 11/13
Public Class Frm2
Private Sub Btnord_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Btnord.Click
Dim n As Integer
Dim cad As String = ""
For n = 3 To 11 Step 2
cad = cad + Str(n) + "/" + Str(n + 2) + " "
Next
Lbls.Text = cad
End Sub
End Class
Programa para generar la serie : 1/2, 2/4, 3/6, 4/8, 5/10
Public Class Frm3
Private Sub Btnord_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Btnord.Click
Dim n As Integer
Dim cad As String = ""
For n = 1 To 5
cad = cad + Str(n) + "/" + Str(n * 2) + " "
Next
Lbls.Text = cad
End Sub
End Class
Programa para generar la serie: 2 ,4, 8, 16, 32

5. Company.Rivera & G
Autor: Santos Nilo Rivera Luján Mi Web: riverasn.p.ht
5
Programa para generar la serie y hallar la suma de: -100, -80, -60, - 40, -20
Public Class Frm5
Private Sub Btnord_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Btnord.Click
Dim n As Integer, s As Integer
Dim cad As String = ""
For n = -100 To 0 Step 20
cad = cad + Str(n) + " "
s = s + n
Next
Lbls.Text = cad
Lblsum.Text = s
End Sub
End Class

6. Company.Rivera & G
Autor: Santos Nilo Rivera Luján Mi Web: riverasn.p.ht
6
MISCELANEA DE LISTAS, COMBOS Y BUCLES
Ejercicio Nro1
Private Sub Button1_Click(...)
Dim n As Integer, i As Integer, sue As Integer
n = Val(TextBox1.Text)
For i = 1 To n
sue = Val(InputBox("Ingrese Sueldo", "FOR"))
Next
End Sub
Ejercicio Nro2
Private Sub Button1_Click(...)
Dim n As Integer, i As Integer, sue As Integer, s As Integer
n = Val(TextBox1.Text)
For i = 1 To n
sue = Val(InputBox("Ingrese Sueldo", "FOR"))
s = s + sue
Next
Label4.Text = s
End Sub

7. Company.Rivera & G
Autor: Santos Nilo Rivera Luján Mi Web: riverasn.p.ht
7
Ejercicio Nro3
Private Sub Button1_Click(...)
Dim n As Integer, i As Integer, sue As Integer, may As Integer
n = Val(TextBox1.Text)
For i = 1 To n
sue = Val(InputBox("Ingrese Sueldo", "FOR"))
If i = 1 Then
may = sue
Else
If sue > may Then may = sue
End If
Next
Label4.Text = may
End Sub
Ejercicio Nro4
Private Sub Button1_Click(...)
Dim n As Integer, i As Integer, sue As Integer, men As Integer
n = Val(TextBox1.Text)
For i = 1 To n
sue = Val(InputBox("Ingrese Sueldo", "FOR"))
If i = 1 Then
men = sue
Else

8. Company.Rivera & G
Autor: Santos Nilo Rivera Luján Mi Web: riverasn.p.ht
8If sue < men Then men = sue
End If
Next
Label4.Text = men
End Sub
Ejercicio Nro5
Private Sub Button1_Click(...)
Dim n As Integer, i As Integer, sue As Integer n = Val(TextBox1.Text)
Do While i < n
i = i + 1
sue = Val(InputBox("Ingrese sueldo", "Do While **** loop"))
Loop
End Sub
Private Sub Button1_Click(...)
Dim n As Integer, i As Integer, sue As Integer
n = Val(TextBox1.Text)
Do
i = i + 1
sue = Val(InputBox("Ingrese sueldo", "Do While **** loop"))
Loop While i < n
End Sub

9. Company.Rivera & G
Autor: Santos Nilo Rivera Luján Mi Web: riverasn.p.ht
9Ejercicio Nro6
Private Sub Button1_Click(...)
Dim n As Integer, i As Integer, s As Integer
ListBox1.Items.Add(TextBox1.Text)
ListBox2.Items.Add(TextBox2.Text)
TextBox1.Text = ""
TextBox2.Text = ""
n = ListBox2.Items.Count
For i = 0 To n - 1
s = s + Val(ListBox2.Items.Item(i))
Next
Label4.Text = s
End Sub
Private Sub Button2_Click(...) ListBox1.Items.Clear() ListBox2.Items.Clear()
Label4.Text = ""
End Sub

10. Company.Rivera & G
Autor: Santos Nilo Rivera Luján Mi Web: riverasn.p.ht
10Ejercicio Nro7
Private Sub Form_Load(…)
ListBox1.Items.Add("Juan Perez")
ListBox2.Items.Add("1200")
ListBox3.Items.Add("200")
ListBox1.Items.Add("Ana Pelaez")
ListBox2.Items.Add("600")
ListBox3.Items.Add("80")
ListBox1.Items.Add("Pedro Juarez")
ListBox2.Items.Add("800")
ListBox3.Items.Add("120")
ListBox1.Items.Add("Luz Huaman")
ListBox2.Items.Add("1500")
ListBox3.Items.Add("300")
ListBox1.Items.Add("Carmen Li")
ListBox2.Items.Add("1700")
ListBox3.Items.Add("290")
End Sub
Private Sub ListBox1_SelectedIndexChanged
Dim pos As Integer, sue As Integer, bon As Integer, pt As Integer
pos = ListBox1.SelectedIndex
ListBox2.SelectedIndex = pos
ListBox3.SelectedIndex = pos
sue = Val(ListBox2.Items.Item(pos))
bon = Val(ListBox3.Items.Item(pos))
pt = sue + bon
Label5.Text = ListBox1.Items.Item(pos)
Label7.Text = pt

11. Company.Rivera & G
Autor: Santos Nilo Rivera Luján Mi Web: riverasn.p.ht
11End Sub
Ejercicio Nro8
Private Sub Form8_Load(...)
ListBox1.Items.Add("Matematicas")
ListBox1.Items.Add("Lenguaje")
ListBox1.Items.Add("Visual Basic Net")
ListBox1.Items.Add("UML")
ListBox1.Items.Add("Historia")
ListBox1.Items.Add("Ingles")
End Sub
Private Sub Button1_Click(...)
Dim pos As Integer
pos = ListBox1.SelectedIndex
If pos = -1 Then Exit Sub
ListBox2.Items.Add(ListBox1.Items.Item(pos))
ListBox1.Items.RemoveAt(pos)
End Sub
Private Sub Button2_Click(...)
Dim n As Integer, i As Integer
n = ListBox1.Items.Count
For i = 0 To n - 1
ListBox2.Items.Add(ListBox1.Items.Item(i))
Next
ListBox1.Items.Clear()
End Sub
Private Sub Button3_Click(...)
Dim pos As Integer
pos = ListBox2.SelectedIndex
If pos = -1 Then Exit Sub
ListBox1.Items.Add(ListBox2.Items.Item(pos))
ListBox2.Items.RemoveAt(pos)

12. Company.Rivera & G
Autor: Santos Nilo Rivera Luján Mi Web: riverasn.p.ht
12End Sub
Private Sub Button4_Click(...)
Dim n As Integer, i As Integer
n = ListBox2.Items.Count
For i = 0 To n - 1
ListBox1.Items.Add(ListBox2.Items.Item(i))
Next
ListBox2.Items.Clear()
End Sub
Trabajo Nro 7:Bucles y Funciones
Predefinidas en el proyecto:
Bucles_Apellidos_Nombres
Programa para generar las siguientes series:
a) 25 30 35 40 45
b) -1 -10 -19 -28 -37
c) 3 9 27 81 243
Programa para generar los n terminos de las series
a) 2 5 8 11 . . .
b) 100 40 -20 -80 . . .
c) 8/3 12/5 16/7 20/9 . . .
Programa para generar la suma de las siguientes series
a) 3 6 9 12 15
b) -3 -9 -15 -21 -27 -33
c) 1/2 4/3 9/4 16/5 25/6
Programa para generar el producto de las siguientes series
a) 1 2 3 4 5
b) 2 4 6 8 10
c) -5 -3 -1 1 3
Programa para ingresar el apellido, unidad1,unidad2 de n alumnos del curso de Computo II de la
Escuela de Ing. Industrial y determine:
a)La cantidad de aprobados
b) La cantidad de jalados
c) La cantidad de aprobados con promedio mayor de 14
d) La cantidad de aprobados con promedio entre 16 y 20
e) El mayor promedio
f) El menor promedio y a quien pertenece
g) El promedio de aula
Nota: Use Inputbox y además
Promedio = Unidad1 + Unidad 2
2
Promedio de Aula = Suma de promedios
N

13. Company.Rivera & G
Autor: Santos Nilo Rivera Luján Mi Web: riverasn.p.ht
13For
Un1=val(inputbox(“ingrese nro1”, “colegio”))
Un2=val(inputbox(“ingrese nro2”, “colegio”))
P =(uni1+uni2)/2
S=s+p
next
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