lowerFirst 
Converts the first character of string to lower case.
Signature 
typescript
function lowerFirst(str: string): string;Parameters 
- str(- string): The string that is to be changed.
Returns 
(string) The string converted.
Examples 
typescript
import { lowerFirst } from 'es-toolkit/string';
lowerFirst('fred'); // returns 'fred'
lowerFirst('Fred'); // returns 'fred'
lowerFirst('FRED'); // returns 'fRED'
