range

Create range of integers

Array[Int] range(Int)

Creates an array of the given length containing sequential integers starting from 0. The length must be >= 0. If the length is 0, an empty array is returned.

Parameters

  1. Int: The length of array to create.

Returns: An Array[Int] containing integers 0..(N-1).

Example: test_range.wdl

version 1.2

task double {
  input {
    Int n
  }

  command <<< >>>

  output {
    Int d = 2 * n
  }
}

workflow test_range {
  input {
    Int i
  }

  Array[Int] indexes = range(i)
  scatter (idx in indexes) {
    call double { n = idx }
  }

  output {
    Array[Int] result = double.d
  }
}

Example input:

{
  "test_range.i": 5
}

Example output:

{
  "test_range.result": [0, 2, 4, 6, 8]
}