how to remove empty char from a string

Hi,

In my code I should get numeric int numbers and convert them to 1 and 0 , concatenate thm to make an string ( 8 chars) . the problem I have is the empty chars as result of conversion from number to string

so lets say pxiAnaIn=1 dutVdd=2 and dutOut=5 so then the output should be 10110001 but now the output is 10110  1 . could you please let me know how can I fix this problem

thanks