whilewhileWhileWhilewhile (Operator)

Name

whilewhileWhileWhilewhile — Starts a loop block that is executed as long as the condition is true.

Signature

while( : : Condition : )

Description

whilewhileWhileWhileWhilewhile executes the loop body up to the corresponding endwhileendwhileEndwhileEndwhileEndwhileendwhile statement as long as the ConditionConditionConditionConditionconditioncondition parameter evaluates to 'true'"true""true""true""true""true" (or a number not equal 0).

If the condition evaluates to 'false'"false""false""false""false""false" (0) the program is continued after the corresponding endwhileendwhileEndwhileEndwhileEndwhileendwhile statement.

Parameters

ConditionConditionConditionConditionconditioncondition (input_control) integer → (integer)

Condition for loop.

Example (HDevelop)

dev_update_window ('off')
dev_close_window ()
dev_open_window (0, 0, 512, 512, 'black', WindowID)
read_image (Image, 'particle')
dev_display (Image)
stop ()
threshold (Image, Large, 110, 255)
dilation_circle (Large, LargeDilation, 7.5)
dev_display (Image)
dev_set_draw ('margin')
dev_set_line_width (3)
dev_set_color ('green')
dev_display (LargeDilation)
dev_set_draw ('fill')
stop ()
complement (LargeDilation, NotLarge)
reduce_domain (Image, NotLarge, ParticlesRed)
mean_image (ParticlesRed, Mean, 31, 31)
dyn_threshold (ParticlesRed, Mean, SmallRaw, 3, 'light')
opening_circle (SmallRaw, Small, 2.5)
connection (Small, SmallConnection)
dev_display (Image)
dev_set_colored (12)
dev_display (SmallConnection)
stop ()
dev_set_color ('green')
dev_display (Image)
dev_display (SmallConnection)
Button := 1
while (Button == 1)
  dev_set_color ('green')
  get_mbutton (WindowID, Row, Column, Button)
  dev_display (Image)
  dev_display (SmallConnection)
  dev_set_color ('red')
  select_region_point (SmallConnection, SmallSingle, Row, Column)
  dev_display (SmallSingle)
  NumSingle := |SmallSingle|
  if (NumSingle == 1)
    intensity (SmallSingle, Image, MeanGray, DeviationGray)
    area_center (SmallSingle, Area, Row, Column)
    dev_set_color ('yellow')
    set_tposition (WindowID, Row, Column)
    write_string (WindowID, 'Area='+Area+', Int='+MeanGray)
  endif
endwhile
dev_set_line_width (1)
dev_update_window ('on')

Result

If the values of the specified parameters are correct, whilewhileWhileWhileWhilewhile (as operator) returns TRUE. Otherwise, an exception is raised and an error code returned.

Alternatives

forforForForForfor, untiluntilUntilUntilUntiluntil

Module

Foundation