I am trying to declare new variable called name in my typescript code. I have only one line of code.
var name:string = "John";
But got error
PS D:\TypeScript> tsc test.ts
C:/Users/Users/AppData/Roaming/npm/node_modules/typescript/lib/lib.d.ts(18568,15): error TS2451: Cannot re
declare block-scoped variable 'name'.
test.ts(1,5): error TS2451: Cannot redeclare block-scoped variable 'name'.
What is the reason behind this error?

