Count if Substring/Number True

[qlikvw2019]

In My below expression for chart , i need to count the column "c_code" only if the first digit is a 3 , please help me with the syntax. The column has values such as "321" or "3-2-1" 

=Count({<left(C_code,1)={$(3)}>}[C_code])

[Frank_Hartmann · Accepted solution]

=Count({<C_code= {"=left(C_code,1) = 3"}>}[C_code])

[qlikvw2019]

Thankyou!