added boolean variables example (#21244)

2018-11-08 05:15:55 -06:00
parent ad678a10ce
commit de990a6ed0
1 changed files with 4 additions and 2 deletions
--- a/guide/english/typescript/boolean-type/index.md
+++ b/guide/english/typescript/boolean-type/index.md
@ -4,8 +4,10 @@ title: Boolean Type

 # Boolean Type

-`boolean` is your basic JavaScript true/false value.
+`Boolean` is your basic JavaScript true/false value.
+`Boolean` variables are used to indicate whether a condition is true or not, or to represent two states, for example if a light is on or off.

 ```typescript
 let isDone: boolean = false;
+let isTurnedOn: boolean = true;
 ```