code

import java.util.Scanner; class Solu{ public static void main(String [] args){ char oper; Double n1,n2,result; Scanner in=new Scanner(System.in); System.out.println("Choose operator: +,-,,or /"); oper=in.next().charAt(0); System.out.println("enter first number"); n1=in.nextDouble(); System.out.println("enter second number"): n2=in.nextDouble(); switch(oper){ case '+': result=n1+n2; system.out.println(n1+"+"+n2+"="+result); break; case '-': result=n1-n2; system.out.println(n1+"-"+n2+"="+result); break; case '': result=n1n2; system.out.println(n1+""+n2+"="+result); break; case '/': result=n1/n2; system.out.println(n1+"/"+n2+"="+result); break; default: System.out.println("invalid"); break; } in.close(); } }