我想要做类似这样的事情:
for (var i=1; i<=10; i++) {
document.write(i + ",");
}
它显示的结果如下所示:
1,2,3,4,5,6,7,8,9,10,
但是我想去掉最后一个“,”,结果应该像这样:
1,2,3,4,5,6,7,8,9,10
我想要做类似这样的事情:
for (var i=1; i<=10; i++) {
document.write(i + ",");
}
1,2,3,4,5,6,7,8,9,10,
1,2,3,4,5,6,7,8,9,10
你应该使用.join
方法代替:
var txt = []; //create an empty array
for (var i = 1; i <= 10; i++) {
txt.push(i); //push values into array
}
console.log(txt.join(",")); //join all the value with ","
for (var i=1; i<=10; i++) {
document.write(i);
if (i<9) document.write(',');
}
join
函数:var arr = [1, 2, 3];
document.write(arr.join(',')); // writes "1,2,3"
您应该检查是否到达了循环的结尾(即 i == 10):
for (var i=1; i<=10; i++) {
document.write(i + (i==10 ? '': ','));
}
试试这个 -
str="";
for (var i=1; i<=10; i++) {
str=str+i + ",";
}
str.substr(0,str.length-1);
document.write(str);
试一下。
var arr = new Array();
for (i=1; i<=10; i++) {
arr.push(i);
}
var output = arr.join(',');
document.write(output);
for (var i=1; i<=10; i++) {
if (i == 10) {
document.write(i);
}
else {
document.write(i + ",");
}
}