Why do we use Option Explicit?

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Question Posted / panigrahi_saroj30

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Why do we use Option Explicit?..

Answer / farah

If we declare variables in option explicit and if
undeclared variabled are used in the code then it displays
error messages

Is This Answer Correct ?

6 Yes

0 No

Why do we use Option Explicit?..

Answer / jim c

Option Explicit forces the programmer to declare all
variables, rather than letting them be implicitly declared
upon their first use.
This enforces good programming practices and avoids
ambiguity of variable scope.
Here are some simple code examples:
'*************************************
i = 1
Call mySub
WScript.Echo i

Sub mySub
i = 10
End Sub
'*************************************
In this first example, because the programmer is relying on
implicit variable declaration, the subroutine is modifying
global variable i, and the printed result is 10. Now, modify
the code so that the variables are declared:
'*************************************
dim i
i = 1
Call mySub
WScript.Echo i

Sub mySub
dim i
i = 10
End Sub
'*************************************
Now, we actually have two different variables named i, one
with global scope, and one with local scope. The printed
result is now 1.
Since a lot of programmers use i in For..Next loops, you can
see how this could result in unpredictable results without
explicit variable declaration

Is This Answer Correct ?

8 Yes

3 No

Why do we use Option Explicit?..

Answer / rekha

there are different ways of declaring variables
this option is used to declare multiple values

Is This Answer Correct ?

6 Yes

3 No

Why do we use Option Explicit?..

Answer / veena

vb supports a datatye called variant which can store any
interger,variable,float..by using option explicit it will
not allow the variables to declare implicitly.

Is This Answer Correct ?

3 Yes

0 No

Why do we use Option Explicit?..

Answer / harry

hi,
when you declare varible you use option Explicit as a
first line of your script .
ex
DIM name

if you do any spelling mistake like nime instead of name
then vb will take this as an new verible and endup giving
unpredictable result while runing.

Is This Answer Correct ?

2 Yes

0 No

Why do we use Option Explicit?..

Answer / p.shivakumar

option explicit is used to declare variable where implicit
command without declaration of variable

Is This Answer Correct ?

1 Yes

0 No

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