版权声明: https://blog.csdn.net/qq_31255557/article/details/89842681
计算1+(1+2)+(1+2+3)+……+(1+2+3+4+5+6+7+8+9+10)
var sum = 0;
for (var i=1;i<=10;i++) {
for (var j=1;j<=i;j++) {
sum = sum+j;
}
}
document.write("1-10的累加值为:"+sum);