class conversion{
    str: string;
    arr: string[]=null;
    read(str: string){
        this.str=str;
        if(this.str==null)
            return "empty";
        console.log("The input string is");
        console.log(this.str);
    }
    display(){
        console.log("The string is converted to array");
        console.log("Converted string is"+this.convert(this.str));
        console.log("After conversion switch string from Lowercase to uppercase");
        console.log("After switching" + this.swap(this.str));
    }
    convert(str: string) {
        var arr1: string[];
        arr1 = this.str.split('');
        return this.arr = arr1;
    }
    swap(str: string) {
        return this.str.toUpperCase();
    }
}
var c=new conversion();
c.read("I am Sridhar working in Syncfusion Software");
c.display();