This structure is used to execute a piece of code
as long as certain conditions are met.
This ranges from executing the code 0 times to the
in infinity number of times executing the code).
General form:
while ([condition])
{
[Code to be executed as long as the condition is true]]
}
<p class=“note”>After the first line there is no ";" character.</p>
<p class=“note”>First it checks if a condition is met, only then any code is executed.</p>
This structure is used to execute a piece of code. Each time after the piece of code is executed, it is checked whether certain conditions are still met, if so, the code is executed again. The number of times the code is executed varies from executing the code 1 time to executing the code in infinity number of times.
General form:
do
{
[Code to be executed as long as the condition is true]]
} while ([condition]);
After the last line is an ";" character.
First, the code is executed once, only then is it checked whether the code may need to be executed more often.
int i = 0;
while(i < 10)
{
MessageBox.Show(“Test”);
i = i + 1;
}
Variable i is initially given the value 0
and MessageBoxes are continued to be displayed
until i is less than 10.
The code is thus passed through with successively
the values 0 , 1, 2, 3, 4, 5, 6, 7, 8 and 9.
Therefore, 10 Messageboxes are displayed with the text “Test”.
int i = 5;
while(i > 0)
{
MessageBox.Show(“Test”);
i = i - 1;
}
Variable i is initially assigned the value 5 and it is
stopped immediately when i is assigned the value 0.
The code is thus passed through with
the values 5, 4, 3, 2, 1.
Therefore, 5 Messageboxes are displayed with the text “Test”.
int i = 10;
do
{
MessageBox.Show(“Test”);
i = i + 1;
}
while (i < 5);
Variable i is initially given the value 10,
the code is executed, and then
Messageboxes are displayed until
until i is less than 5.
Thus, the code is continued with the value 10.
Therefore, 1 Messagebox is displayed with the text “Test”.