Help, how to convert data type

[a876595353]

Who can teach me?how to convert data type？
For example,I have
a='3',b='2'
They are all strings。
But I want to take the number 3 minus the number 2，What should I do?
Is there a way to convert a string to an integer?
These are translated by software，If you can read it, please help me.

 

[dsnz]

action set variable (set an integer variable)
with expression [strval=a]-[strval=b]

in order to get strval
in the expression line click on the 3 dots to see all magic text
and select "String variable value"

 

[a876595353]

action set variable
with expression [strval=a]-[strval=b]

Thank you for reply，But that's not going to work。If I set the string variable c= variable A -variable B，I'm going to get a string a - b。If I set an integer variable c，So I can't use expression subtraction，There's no confirm button for me to click.If so, can you give me a correct picture?Thank you very much

 

[dsnz]

what I wrote works when setting an integer variable,
I tested it (I always test) try it !

for more details see my original post which I have updated

 

[Dm114]

Thank you for reply，But that's not going to work。If I set the string variable c= variable A -variable B，I'm going to get a string a - b。If I set an integer variable c，So I can't use expression subtraction，There's no confirm button for me to click.If so, can you give me a correct picture?Thank you very much

@dsnz is right. Create an integer or decimal variable and write the expression
[strval=string_var_A]-[strval=string_var_B]

You should have a look to https://macrodroidforum.com/wiki/index.php/MacroDroid_Wiki

 

[a876595353]

@dsnz is right. Create an integer or decimal variable and write the expression
[strval=string_var_A]-[strval=string_var_B]

You should have a look to https://macrodroidforum.com/wiki/index.php/MacroDroid_Wiki

Thank you very much, both of you. Now I understand.

 

[a876595353]

what I wrote works when setting an integer variable,
I tested it (I always test) try it !

for more details see my original post which I have updated

Thanks again, I understand.