If () Then, Else
If then else 3.0.png
Category Control
Type C

The If () Then, Else block is a Control block and a C block. The block will check its boolean condition. If the condition is true, the code held inside the first C (space) will activate, and then the script will continue; if the condition is false, the code inside the second C will activate (unlike the If () Then block).

In Scratch 1.4, this block was named If (), Else.

Example Uses

In programming, a very important part is "checking conditions." this is done with the If () block. However, an important part of the "checking conditions" is having another piece of code that runs if the condition is false. While this may be worked around, the If (), Else block makes this simpler. Some common uses:

  • Do "this" (the code inside the first C) or "that" (the code inside the second C)
repeat until <touching [edge v]?>
if <(loudness) > [30]> then
say [No loud noises.] for (2) secs
move (10) steps
  • If a Sprite's health is below a certain amount, it dies, otherwise it does something else
when gf clicked
if <(health) = [0]> then
play sound [Failure v]
stop [all v]
broadcast [attack v]
  • Easy script changes — if a variable equals a certain value, one thing happens, and if the variable does not equal the value, a different thing happens
if <(answer) = [5]> then
say [Correct!] for (2) secs
play sound [failed task v] until done
stop [all v]
  • Scripts that are adaptable to changes in conditions (such as a changing variable)
if <touching color [#7092be]?> then
 say [We found water!]
 say [ ]


Main article: List of Block Workarounds

This block can be replicated with the following code:

if <. . .::grey> then
 . . . //condition=true
if <not <. . .::grey>> then
 . . . //condition=false


if <. . .::grey> then
. . .::grey
broadcast [continue v]
stop [this script v]
. . .::grey

Note that this last workaround only works if the condition will not be negated in the middle of the first If () block.


Scratchers have suggested a block that reports the first input if true, otherwise if false, reports the second input.[1]

(if <> then [] else []::operators)

It would be in the Operators category.

This block does exist in some Scratch modifications, such as Insanity.

See Also


  1. topic:33995