摘要：var sum = "";for(var i = 0;i < 5;i++) { for(var j = 0;j < 5 - i;j++) { sum += " "; } for(var j = 0;j < 2*i + 1;j++) { sum += "*"; } sum += "\n"; }cons 阅读全文

摘要：var sum = "";for(var i = 0;i < 5;i++) { for(var j = 0; j < 5; j++) { sum += "*" + " ";//1 2 3 4 } sum +="\n"; }console.log(sum); /* sum=" " 这里的“” 给他一个 阅读全文

摘要：var arr = [60,70,70,80,90];var min_socer = arr[0];for(var i = 0;i < arr.length;i++) { if(min_socer > arr[i]){ min_socer = arr[i]; }}console.log(min_so 阅读全文