javascript 3道练习题.js

var john = [89,120,103]; var sum=0; for(var i = 0; i < john.length; i++){ sum += john[i]; } var mean1 = sum / john.length; console.log("john:",mean1); var mike = [116,94,123]; var sum=0; for(var i = 0; i < mike.length; i++){ sum += mike[i]; } var mean2 = sum / mike.length; console.log("mi