The length function gives the length of an expression. The expression is mostly a variable

Syntax

output = length(expression)

Inputs

expression : a reference to a variable or any [[expression|Expressions]].

Output

output : a numerical value which represents the length of the input expression.

Example flow

Schema dummy{
  a [string b]
}
Schema dummyOutput{
  number x 
}
value dummyValue -> dummy {
  a[{"x"}{"y"}]
}

Mapping dummyMapping input dummyValue as p output dummyOutput as q {
 q.x = length(p.a)
}

Output for Example Flow

{ x : 2 }