Use of If and substring expression in MS flow

[Talha]

Hi all,

i am having a two digit number ( variable) in compose output as 05, 45 etc

i need to check the second digit (red color), if second digits is Zero (0) then i need to remove the zero and use first digit.

if second digits is not zero then i need to use both digit.

i have tryed using expression in flow, but its show error message as The Expression is Invalid. the expression is 

if(substring(outputs('Compose'),0,1) = 0,substring(outputs('Compose'),1,1),outputs('Compose'))

please tell me what is wrong in my coding.

[Pieter_Veenstra · Accepted solution]

Why make things complicated?

the following expression will remove any leading 0s

int(outputs('Compose'))