Visual Basic - Loop with condition on the beginning: while end while, do while loop

Condition testing is done at the beginning of the loop. before each iteration the condition is tested, if it is was true. before the first iteration is a condition test, the use of this loop is excellent in situations where perhaps we don't need to execute the cycle.

while end while

Description

while condition
statements
end while

Used keywords: while end

Input

condition - Logical value The condition can be any expression
statements - statements

Note: Here usable statements:
break statement continue statement

Examples

Visual Basic .NET

Loop with condition on the beginning the possible of use:

i=0
while i<10
 i=i+1
end while
x =0
while i<20
 i= i+2
 if i=16 then
    continue while
 end if
 x=x+1 
end while

Visual Basic .NET

Other pieces of example codes:

while i>0
   if i=10 then
     exit do
   else
     i=i-1
   end if
end while

if  x >= 12 then
   while  y >= 0   
      y=y-1
end while
end if

while  y <= 32   
   y=y+1
end while

do while loop

Description

do while condition
statements
loop

Used keywords: do while loop

Input

condition - Logical value The condition can be any expression
statements - statements

Note: Here usable statements:
break statement continue statement

Examples

Visual Basic .NET

Loop with condition on the beginning the possible of use:

i=0
while i<10
 i=i+1
end while
x =0
while i<20
 i= i+2
 if i=16 then
    continue while
 end if
 x=x+1 
end while

Loop with condition on the beginning in another programming language:

Differences to: