subString()
Given a String and specified parameters, returns a part of that String.
Syntax
subString(string, start[, length])
- string - the String value from which to derive the returned String
- start - the starting index of the returned String
- length - (optional) the length of the returned String
- Return type: String
Sample usage
subString("Piece of cake.", 2) returns "ece of cake."
subString("Piece of cake.", 2, 3) returns "ece"
Supported data types
Input type | Return type | Logic |
String | String | If a String value is passed, that value will be interpreted beginning with the start index. If a length is provided, the returned String will contain that many characters, beginning with the index. If not, the returned String will contain all remaining characters beginning with the index. |
Unsupported data types | Null | Unsupported data types return Null. |

Updated 03 May 2023
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