Install calc102-------------> npm i calc102
Require calc102-------------> const calc = require("calc102");
add(val1,val2)--> sum two arguments. let res=calc.add(val1,val2);
sub(val1,val2)--> substract two arguments. let res=calc.sub(val1,val2);
mult(val1,val2)--> multiply two arguments. let res=calc.mult(val1,val2);
div(val1,val2)--> divide two arguments. let res=calc.div(val1,val2);