Condicion-Mientras.rst

Mientras loop (While Loop)

The mientras loop executing a block of code repeatedly as long as its condition is still met (is true).

This loop first verifies that its condition is met before executing the code. ----

Syntax of the loop "mientras"

Syntax example

mientras (condition)
  #Code block
fin

Code example

/*
As long as the operation is true
this code will write on screen
the following numbers:
0 1 2 3 4 5 6 7 8 9
*/

i=0

mientras i < 10
  escribir(i)
  i++            //Increases the value of i
fin

Note

In this example, if the value of the variable i is not increased, this loop would repeat infinitely without stopping, producing an error in memory.

---

Difference between "mientras" and "desde" ---------------------------------------As you may have noticed, the mientras command and the desde command are very similar to each other, with the difference that the mientras command does not require a declaration or statement as in the desde command .

Example #1: "desde"

This example uses the command desde to acquire the car brands in a variable.

/*
In this example, print on screen:
BMW
Volvo
Ford
Nissan
*/

cars = ["BMW", "Volvo", "Ford", "Nissan"]
text = ""

desde (i=0; i < lista.longitud(cars); i++)
  text = text..cars[i].."\n"     # \n means new line
fin

escribir(text)

Example #2: "mientras"

This example is similar to the previous one with the difference that the mientras command will be used .

/*
In this example, print on screen:
BMW
Volvo
Ford
Nissan
*/

cars = ["BMW", "Volvo", "Ford", "Nissan"]
i = 0
text = ""

mientras(i < lista.longitud(cars))
  text = text..cars[i].."\n"     # \n means new line
i++
fin

escribir(text)