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'C bloklarının genel şekli'.

Bir C bloğu "C" harfine benzeyen bir blok bloktur, böylece diğer bloklar içine girebilir. These blocks perform the conditions and loops.


C blocks have a "mouth" (it looks like the letter "C", hence the name) — the blocks that will be played with the C block go in these mouths. All but one of the C blocks consist of one mouth — the other, If () Then, Else, consists of two mouths. When any of the other C blocks are dragged over a stack of blocks — if the C is empty — its mouth extends to wrap around them.

(10) defa tekrarla
<(ses yüksekliği :: sensing) > [30]> olana kadar tekrarla
(1) x: (10) y: (0)'a git :: motion
(1) saniye bekle
x: (0) y: (0) konumuna git :: motion
[meow v] sesini bitene kadar çal

In 1.2.1 and earlier, C-block scripts could only be built one block at a time.


In Scratch 2.0, there are five C blocks, and they can all be found in the Control category.

The Forever If () block.

In Scratch 1.4 and earlier, there was also a Forever If () block. It was replaced with its workaround.

if <> then


As C blocks are for checks and loops, they are used almost everywhere. Some uses include:

  • Things that must go on forever
when gf clicked
turn cw (15) degrees
  • Checking a condition
when [space v] key pressed
if <(loudness) > [30]> then
stop [all v]
  • Repeating an animation a certain amount of times
when gf clicked
repeat (200)
turn ccw (36) degrees
change [color v] effect by (1)

Here is an example for both checks and looping:

when I receive [Decrease health v]
change [Health v] by (-1)
if <(health) = [0]> then
repeat (8)
change [color v] effect by (25)
  • Starting/Stopping
when gf clicked
if<key [space v] pressed?> then
stop [all v]

There is a check (the If () Then block is checking if the variable Health has a value of 0), and inside the check is a repeat loop (with the Repeat () block). Note how C blocks can be placed inside other C blocks.

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