Scratch

360-International · 2012-02-19 20:01:37

Older tutorials: Wall Jumping (12-Feb-01)

This is a quick script to test whether or not a variable's value is a string (text) or a number.

NOTE: This is not the same as checking if something is a word or not.

Make this variable:

(report)

Then add this script where you need to check the input:

if <(input) = ((1) * (input))> //Replace "input" with the actual input.
set [report v] to [number]
else
set [report v] to [string]
end

The variable "report" will say "number" if it is a number, and "string" if it is not.

How this works:
If Scratch encounters a string that it has to operate with, it evaluates the variable as equaling zero, whereas if not, the variable is evaluated as the string it contains. In other words, "input" alone is what is in the variable. However, when anything is done to it (for example, multiplying it by 1), the string must be turned into a number. Scratch will always turn any string into the number 0 when it needs to. (This does not change the value of the variable.)

If you find any way to improve on the scripts above, please reply.

Last edited by 360-International (2012-02-19 20:11:31)

laptop97 · 2012-02-19 20:04:16

Cool

AtomicBawm3 · 2012-02-19 20:31:49

Very clever...that'll be helpful for games and such that use the ask block.

analytic · 2012-02-20 03:40:37

This technique has existed for some time.
But it certainly will be very useful in many ask/answer projects in the future.

bobbybee · 2012-02-20 06:16:40

if <<(input) = ((1) * (input))> or <(input) = [0]>> //Replace "input" with the actual input.
set [report v] to [number]
else
set [report v] to [string]
end

Last edited by bobbybee (2012-02-20 06:17:05)

360-International · 2012-02-20 20:33:32

bobbybee wrote:

if <<(input) = ((1) * (input))> or <(input) = [0]>> //Replace "input" with the actual input.
set [report v] to [number]
else
set [report v] to [string]
end

How does this help? (not criticizing)

scimonster · 2012-02-21 03:10:41

360-International wrote:
bobbybee wrote:
if <<(input) = ((1) * (input))> or <(input) = [0]>> //Replace "input" with the actual input.
set [report v] to [number]
else
set [report v] to [string]
end
How does this help? (not criticizing)

It's an improved version. Your version will report "string" if it's a number, but this doesn't.

rdococ · 2012-02-21 10:14:02

scimonster wrote:
360-International wrote:
bobbybee wrote:
if <<(input) = ((1) * (input))> or <(input) = [0]>> //Replace "input" with the actual input.
set [report v] to [number]
else
set [report v] to [string]
end
How does this help? (not criticizing)
It's an improved version. Your version will report "string" if it's a number, but this doesn't.

Actually, if the input was 0,

<(input) = ((1) * (input))>

equals true, which will report "number". And 0 IS a number.

Magnie · 2012-02-21 10:32:01

An example of what you could use it for:

when gf clicked
forever
    ask [Enter a number or string] and wait
    if <(answer) = <(1) * (answer)>>
        say [Number] for (2) secs
    else
        say [String] for (2) secs
    end

And yes, inputting a zero will work. smile

RedRocker227 · 2012-02-21 10:39:20

Cool.

scimonster · 2012-02-21 11:22:01

rdococ wrote:
scimonster wrote:
360-International wrote:
How does this help? (not criticizing)
It's an improved version. Your version will report "string" if it's a number, but this doesn't.
Actually, if the input was 0,
<(input) = ((1) * (input))>
equals true, which will report "number". And 0 IS a number.

Oh, you're right. tongue I didn't realize that. XD

bobbybee · 2012-02-21 14:30:28

Doh!

360-International · 2012-03-11 22:33:25

bobbybee wrote:
Doh!

Huh?

Scratch

archived forums

#1 2012-02-19 20:01:37

Tutorial: Testing if something is a string or a number. (12-Feb-19)

#2 2012-02-19 20:04:16

Re: Tutorial: Testing if something is a string or a number. (12-Feb-19)

#3 2012-02-19 20:31:49

Re: Tutorial: Testing if something is a string or a number. (12-Feb-19)

#4 2012-02-20 03:40:37

Re: Tutorial: Testing if something is a string or a number. (12-Feb-19)

#5 2012-02-20 06:16:40

Re: Tutorial: Testing if something is a string or a number. (12-Feb-19)

#6 2012-02-20 20:33:32

Re: Tutorial: Testing if something is a string or a number. (12-Feb-19)

bobbybee wrote:

#7 2012-02-21 03:10:41

Re: Tutorial: Testing if something is a string or a number. (12-Feb-19)

360-International wrote:

bobbybee wrote:

#8 2012-02-21 10:14:02

Re: Tutorial: Testing if something is a string or a number. (12-Feb-19)

scimonster wrote:

360-International wrote:

bobbybee wrote:

#9 2012-02-21 10:32:01

Re: Tutorial: Testing if something is a string or a number. (12-Feb-19)

#10 2012-02-21 10:39:20

Re: Tutorial: Testing if something is a string or a number. (12-Feb-19)

#11 2012-02-21 11:22:01

Re: Tutorial: Testing if something is a string or a number. (12-Feb-19)

rdococ wrote:

scimonster wrote:

360-International wrote:

#12 2012-02-21 14:30:28

Re: Tutorial: Testing if something is a string or a number. (12-Feb-19)

#13 2012-03-11 22:33:25

Re: Tutorial: Testing if something is a string or a number. (12-Feb-19)

bobbybee wrote:

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