Where is Control Passed to Next in This 'While' Loop?

[koranged]

I am going step by step through the manual and have become a bit confused at this page - https://book.mql4.com/operators/continue. My question should be pretty simple for anyone who understands these loops and where control should/shouldn't be passed to next. Here's the full code:

//-------------------------------------------------------------------------------------
// sheep.mq4
// The code should be used for educational purpose only.
//-------------------------------------------------------------------------------------
int start()                               // Special function start()
  {
//-------------------------------------------------------------------------------------
   int
   day,                                   // Current day of the month
   Mons;                                  // Search amount of months
   double
   One_Farm    =1000.0,                   // Sheep on the 1st farm
   Perc_day    =1,                        // Daily increase, in %
   One_Farm_max=50000.0,                  // Sheep limit
   Perc_exit   =10,                       // Monthly output, in %
   Purpose     =35000.0,                  // Required amount on farm 2
   Two_Farm;                              // Current amount of farm 2
//-------------------------------------------------------------------------------------
   while(Two_Farm < Purpose)              // External cycle on history
     {                                    // Start of the external cycle body
      //-------------------------------------------------------------------------------
      for(day=1; day<=30; day++)          // Cycle for days of month
         One_Farm=One_Farm*(1+Perc_day/100);//Accumulation on the 1st farm
      //-------------------------------------------------------------------------------
      Mons++;                             // Count months
      if (One_Farm < One_Farm_max)        // If the amount is below limit,.
         continue;                        // .. don't transfer the sheep
      Two_Farm=Two_Farm+One_Farm*Perc_exit/100;//Sheep on the 2nd farm
      One_Farm=One_Farm*(1-Perc_exit/100);// Remainder on the 1st farm
     }                                    // End of the external cycle body
//-------------------------------------------------------------------------------------
   Alert("The aim will be attained within ",Mons," months.");//Display on the screen
   return;                                // Exit function start()
  }
//-------------------------------------------------------------------------------------

The following section is leading to my confusion:

//-------------------------------------------------------------------------------
      for(day=1; day<=30; day++)          // Cycle for days of month
         One_Farm=One_Farm*(1+Perc_day/100);//Accumulation on the 1st farm
      //-------------------------------------------------------------------------------

Following execution of the 'for' operator body, variable 'One_Farm' will be assigned the value of 1010, and control will then be passed to 'Expression_2' - 'day++', which will increment the value of 'day' by 1 and then pass control to either:

'Expression_1' of the 'for' loop again. This process continues until condition 'day<=30' is false, at which point control can be passed outside of the 'for' loop to the next line of the code - 'Mons++' 

or

'Mons++' which will be executed as soon as the first iteration of 'day++' is completed - regardless of whether or not 'day<=30' is false.

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Which of the above is correct?

Thanks for assistance.

[Amir Yacoby]

https://www.mql5.com/en/docs/basis/operators/for

[William Roeder]

koranged:

for(day=1; day<=30; day++) One_Farm=One_Farm*(1+Perc_day/100);

'Expression_1' of the 'for' loop again. This process continues until condition 'day<=30' is false, at which point control can be passed outside of the 'for' loop to the next line of the code - 'Mons++' 

or

'Mons++' which will be executed as soon as the first iteration of 'day++' is completed - regardless of whether or not 'day<=30' is false.

Mons++ is not part of the for loop. It executes after the for loop exits.

[koranged]

whroeder1:
Mons++ is not part of the for loop. It executes after the for loop exits.

Thankyou.

[Hector Pacheco]

It is good practice to use the value with decimal point when you are manipulating double type values.

The operation (1 + Perc_day / 100) could generate an integer value that would always be equal to 1.

The correct method would be (1.0 + Perc_day / 100.0)

[koranged]

Hector Pacheco:

It is good practice to use the value with decimal point when you are manipulating double type values.

The operation (1 + Perc_day / 100) could generate an integer value that would always be equal to 1.

The correct method would be (1.0 + Perc_day / 100.0)

Okay cheers.