QGIS/resources/function_help/json/left

{
  "function": "left",
  "description": "Returns a substring that contains the <i>n</i> leftmost characters of the string.",
  "arguments": [ {"arg":"string","description":"a string"},
                 {"arg":"length","description":"integer. The number of characters from the left of the string to return."}],
  "examples": [ { "expression":"left('Hello World',5)", "returns":"'Hello'"}
  ]
}