مساعدة

[msa5]

اذا ممكن حد يشرحلي ال function , procedures انا فاهم الفكرة العامة بس مش فاهم امتا بنستعمل function وامتا بنستعمل procedures و byref , byval

[2501]

u use function when u need it...

byval means the parameter value passed into the function or procedure can not be changed when the application returns from the function or procedure...

byref or ref or & or % means that the value of the original variable that was passed as a parameter to this function or proc. can be changed when the application returns from the function or proc.

C/CPP/CPP.NET:
it is good practice to pass huge variables to a function as a constant reference...(effecient)

[msa5]

u use function when u need it...

i know but i mean what the differance between the function and the procedures

[amgadpasha]

what s th language u r using, not all th language supports procedures, mainly proc r functions that doesn't return values, so u call them for doing something, like printing something on the screen or whatever static senarios, sometimes procedurs also doesn't take parameters or arguments, so it's just a fixed behaviour, but again, this is based on the language u r using, in c for example there is nothing called procedurs

[moh_mhe]

Procedure

يمكنك عمله لإجراءات معينة مع إرسال Parameters و لكن بدون إرجاع قيمة

Fuction

نفس عمل Procedure ولكن يمكنك إرجاع قيمة

Example to calculate the sum of to numbers by VB

Procedure:

Sub GetSum(Val1 As long,Val2 As Long,ByRef Val_Sum As long)

Val_Sum =Val1 +Val2

End Sub

Function:

Function F_GetSum(Val1 as long,Val2 as Long) As Long

F_GetSum =Val1 +Val2

End Sub

''How to get the sum of 4 and 5

Procedure:

Dim V_SUM As long

Call GetSum 4,5, V_SUM

'Function:

V_SUM =f_GetSum(4,5)

[msa5]

thanks for everyone

i use VB6