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javascript习题,javascript例题
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JavaScript 练习题求解答
1.
for(var i=1000;i=9999;i++){
if(i%13==0){
var n2 = Math.floor(i/10)%10;
var n3 = Math.floor(i/100)%10;
var n4 = Math.floor(i/1000);
if(n2+n3==n4)
console.log("满足条件的数为："+i);
}
}
2.
var sum = 0, start = 1, end=0, n=1;
while(start 500) {
for(n = start; sum 1000; n++) {
sum += n;
if(sum == 1000) {
end=n;
console.log("连续相加为1000的连续正整数为:"+start+"到"+end);
}
}
start++;
sum = 0;
}
相关问答
Q1: JAVASCRIPT中提示缺少对象
有几个毛病：
1. 拼写错误
"funtion" 应该为 "function"
"flase" 应该为 "false"
"ture" 应该为 "true"
"onClick="cancleHandle()"" 应该为 "onClick="cancelHandle()""
2.条件判断用==
3.还有if else语句不对：
if ()
{
}
else
{
}
或者
if ()
xxxx;
else
yyyy;
=============================================
funtion checkVaid1(s) **** "funtion" = "function"
{
var len=s.length;
{ **** 去掉
if(len!=0)
return flase; **** "flase" = "false"
} **** 去掉
else return ture; **** "ture" = "true"
}
funtion checkVaid2(s) **** "funtion" = "function"
{
var len=s.length;
{ **** 去掉
if(len=11); **** if(len==11) 条件判断用==；去掉多余的分号
return flase; **** "flase" = "false"
} **** 去掉
else return ture; **** "ture" = "true"
}
funtion okHandle() **** "funtion" = "function"
{
if(checkVaid1(document.test.Name.value))
{
alert("姓名不能为空！");
}
else if(checkVaid2(document.test.Number.value))
{
alert("学号长度不对");
}
else if(checkVaid1(document.test.Class.value))
{
alert("班级不能为空");
}
else
{
alert("您填写正确！");
}
}
funtion cancelHandle() **** "funtion" = "function"
{
document.test.Name.value="";
document.test.Number.value="";
document.test.Class.value="";
}
=============================================
input type="button"name="cancel"value="取消"onClick="cancleHandle()" **** "cancleHandle" = "cancelHandle"
Q2: javascript计算圆的周长和面积，求代码
function circle(r){
var zc=2*3.1415926*r;
var mj=3.1415926*r*r;
console.log('圆的周长为:'+zc);
console.log('圆的面积为:'+mj);
}
circle(2);
输入半径r即可输出对应周长和面积
