Statement let
The let statement is used to introduce a named variable and initialize it or change the value of an existing variable. If a variable already exists then the let at the start is optional.
The type of the variable is determined by the expression used.
| let Statement | ||
|---|---|---|
| Format | Example | Result |
| let name = expr; | let result = 20 * 345; | result holds field value 6900 |
| let name += expr; | let result += 50; | result holds field value 6950 |
| let name -= expr; | let result -= 6000; | result holds field value 950 |
| let name *= expr; | let result *= 3; | result holds field value 2850 |
| let name /= expr; | let result /= 10; | result holds field value 285 |
| name = expr; | result = 50 .. 30; | result holds range value 30 .. 50 |
| name = expr; | result = "Hello"; | result holds string value "Hello" |
| name += expr; | result += " world"; | result holds string value "Hello world" |
| Example Script |
|---|
| let day = date.g:dmy "1sep2017"; let result = string.g:dmy (day + 5 * 7); writeln "Date 5 weeks from " + string.g:dmy day + " is: " + result; day -= 2 * 7; writeln "and a fortnight before was " + string.g:dmy day; |
Output:-Date 5 weeks from 1 Sep 2017 is 6 Oct 2017
and a fortnight before was 18 Aug 2017
|
