The operation > cannot accept the arguments [empty string], [4]

[mustafaalbasel]

its an error about calculating

[TIMAI2]

Looks like this one ?

Investigate

[mustafaalbasel]

i tried too much on it i even changed it to text, i put 0 for all texts to not to get the error but still getting it !, i changed the or to and and still getting the error

[mustafaalbasel]

when adding a num and then press x its showing the error

[mustafaalbasel]

can i eliminate the user when press removing to not to be a blank at least 1on the keyboard?

[Taifun]

see the first example

Common Runtime Errors

Empty Textbox (when used for calculations) [image] [image] Ensure that your text box is initialised with a number or zero before attempting any calculations Empty Socket in block [image] [image] Variable not initialised as a List [image] [image] Not checking the length of a list! [image] [image] Wrong argument type (clock) [image] [image] more to follow.....

Taifun

[mustafaalbasel]

so how can i make such equations with the global?

if i wanna say set text box1 to text box 2 * 5

[Taifun]

Before comparing make sure, the textboxes are not empty....
This also is called data validation

Taifun

[mustafaalbasel]

am adding to their text as 0 and they will be changed due to the user choosing whatever taxt or van and inside the city or outside, that all my equations in so i wanna just add a global for all these texts to not to get the error

[Taifun]

Why not checking for empty string before doing something?

If is empty myTextbox.Text
Then "please enter a value"
Else continue with your blocks

Taifun

[mustafaalbasel]

thanks so much i put it and i found an error i put no people in the spinner as empty as well so its working now