cylinderVol.js

function calcCylinderVol(arr){
  var radius =Number(arr[0]) ;
  var height = Number(arr[1]);
  var volume = Math.PI*(Math.pow(radius,2))*height;
  var precisevolume =     volume.toFixed(3);
    
  console.log(precisevolume);
}


var arr=[2,4];
calcCylinderVol(arr);
var arr=[5,8];
calcCylinderVol(arr);
var arr=[12,3];
calcCylinderVol(arr);