Conditional Expression

// ternary condition operator
x==1 ? 10 : 20 // if x equals 1, this expression returns 10, otherwise 20.

// nested usage
x==1 ? 10 : 
    x == 2 ? 20 :
    x == 3 ? 30 : 
    40

// syntax for a switch with branches doesn't exist yet

In Measures:

sum(q1 <= 5 ? null : q1) // sum of all values greater than 5

In Groups:

// nested ternary condition operator to define a group
segment==1 ? true : (segment==2 and q5==1) ? true : false