Conditional operator in Shell Arithmetic section

[uzibalqa]

Have been reading the manual about the arithmetic conditional operation 
described by 

expr ? expr : exp

This is quite difficult to understand exactly how to use it.

For instance, consider setting the variable opst to 0 when the length of delim 
in positive in a bash script.  One would use 

opst=$(( ${#delim} > 0 ? 0 : 1 ))

There needs to be at least one example of actual use in a typical situation.  I 
also suggest to include it in section "3.2.5.2 Conditional Constructs".

Specifying conditional operator "expr ? expr : exp"  simply as Shell Arithmetic 
makes it very difficult to find in the manual.