Operators Blocks

"Green Blocks" redirects here. For the teal blocks, see Pen Blocks.

Operators blocks is one of the ten categories of Scratch blocks. They are color-coded light-green, and are used to script math equations and string handling. It was previously titled Numbers Blocks, but was renamed in Scratch 1.4 due to new blocks that handled strings.

There are currently 17 Operators blocks: 6 Boolean blocks and 11 Reporter blocks. This and PicoBoard Blocks are the only categories to contain no Stack blocks.


Warning Note: Click on a block to learn more about it!

Scratch 2.0 has the following 6 Operators Boolean Blocks:

Scratch 2.0 has the following 11 Operator Reporter blocks:

Obsolete Blocks

Prior to Scratch 1.2, the () of () block was two separate blocks, Abs () and Sqrt (), with no other mathematical functions.


Scratchers have suggested an Operators block that solves exponents.[1][2]

(() ^ ():: operators)

Some Scratchers have suggested true and false Booleans, however this has not been implemented, possibly due to the easy workaround. [3] Here is a sample of what such blocks might look like:


Here is the workaround that is usually mentioned [4]:

set [variable v] to [true]

set [variable v] to [false]

Scratchers have also suggested a boolean block that checks to see if a string contains a word. However, this can easily be worked around. The suggested block would appear as:

[] contains []::operators

The workaround appears as follows:

define does [string] contain [word]?
set [letter# v] to (1) 
delete (all v) of [words v] 
add [] to [words v] 
repeat (length of (string)) 
if <(letter (letter#) of (string)) = [ ]> then
add [] to [words v] 
replace item (last v) of [words v] with (join (item (last v) of [words v]) (letter (letter#) of (string)))
change [letter# v] by (1)
if <[words v] contains (word)> then
set [contains? v] to [true]
set [contains? v] to [false]


  1. http://scratch.mit.edu/discuss/topic/9907
  2. https://scratch.mit.edu/discuss/topic/107714/
  3. https://scratch.mit.edu/discuss/topic/150228/
  4. https://scratch.mit.edu/discuss/topic/8618/?page=1#post-60017
  • This page was last modified on 16 February 2018, at 01:44.