级计算器的JavaScript未运行

我试图创建在JavaScript中档次的任意值等级计算器。代码运行时，代码的任何部分都不会被执行。在我的代码的语法中是否存在明显的错误？谢谢，本级计算器的JavaScript未运行

var numberofgrades = prompt("How many grades do you want to calculate?"); 
var countingvalue = 1; 
var grades = [0]; 
var tempgrade = 0; 
var averagetotal = 0; 
for(i=0;i<numberofgrades;i++;){ 
if(countingvalue!=numberofgrades){ 
    var tempgrade= prompt("What is your "+countingvalue"th grade?") 
    grades.push(tempgrade); 
    countingvalue++; 
} 
else if(countingvalue==numberofgrades){ 
    for(var j=1;j=<numberofgrades;j++){ 
     averagetotal = grades[j]+averagetotal; 
    } 
} 
    alert("Your average grade is: "+(averagetotal/numberofgrades));

最新编辑的代码 -

var numberofgrades = prompt("How many grades do you want to calculate?"); 
var countingvalue = 1; 
var grades = [0]; 
var tempgrade = 0; 
var averagetotal = 0; 
for(i=0;i<numberofgrades;i++){ 
if(countingvalue!=numberofgrades){ 
    var tempgrade= prompt("What is your "+countingvalue+"th grade?") 
    grades.push(tempgrade); 
    countingvalue++; 
} 
else if(countingvalue==numberofgrades){ 
    for(var j=1;j<=numberofgrades;j++){ 
     averagetotal = grades[j]+averagetotal; 
    } 
    } 
} 
alert("Your average grade is: "+(averagetotal/numberofgrades));

我的语法只是固定的这个问题，并正在运行。我有问题添加两个数字，而不是我的程序连接值。感谢您的帮助，本

var averagetotal = (grades[j]+averagetotal);

这是整个代码。

var numberofgrades = prompt("How many grades do you want to calculate?"); 
var countingvalue = 0; 
var grades = []; 
var tempgrade = 0; 
var averagetotal = 0; 
for(var i=0;i<=numberofgrades;i++){ 
if(countingvalue!=numberofgrades){ 
    if(countingvalue==1){ 
    var tempgrade= prompt("What is your "+(countingvalue+1)+"st grade?"); 
    grades.push(tempgrade); 
    countingvalue++; 
} 
    else if(countingvalue!=1){ 
    var tempgrade= prompt("What is your "+(countingvalue+1)+"th grade?"); 
    grades.push(tempgrade); 
    countingvalue++; 
    } 
} 
else if(countingvalue==numberofgrades) 
{ 
    for(var j=0;j<numberofgrades;j++){ 
     var averagetotal = (grades[j]+averagetotal); // problem line 
     alert(j+" "+averagetotal); //checking values 
    } 
} 


} 
alert(grades[0]); //just checking values 
alert(grades[1]); //checking values 
alert(averagetotal); 
alert("Your average grade is: "+(averagetotal/numberofgrades));

来源

2015-10-02 Benjamin Walker

您有语法错误。取而代之的

for(i=0;i<numberofgrades;i++;)

应该

for(i=0;i<numberofgrades;i++)

代替

var tempgrade= prompt("What is your "+countingvalue"th grade?")

也应该是

var tempgrade= prompt("What is your "+countingvalue+"th grade?")

也

for(var j=1;j=<numberofgrades;j++){

，而不是

应该

for(var j=1;j<=numberofgrades;j++){

终于有似乎是你的括号中的问题 - 你缺少}末

来源

2015-10-02 22:01:01

变量应保持本地和位空白的帮助：'用于（VAR I = 0; I RobG

谢谢，但程序仍然不会运行。 –

明白了，我通常只是想保证我的所有变量都在适当的范围内。 –

试试这个代码

个

<script> 
var numberofgrades = prompt("How many grades do you want to calculate?"); 
var countingvalue = 1; 
var grades = [0]; 
var tempgrade = 0; 
var averagetotal = 0; 
for(var i=0;i<numberofgrades;i++){ 
if(countingvalue!=numberofgrades) 
{ 
    var tempgrade= prompt("What is your "+countingvalue+"th grade?"); 
    grades.push(tempgrade); 
    countingvalue++; 
} 
else if(countingvalue==numberofgrades) 
{ 
    for(var j=1;j<numberofgrades;j++){ 
     averagetotal = grades[j]+averagetotal; 
    } 
} 

    alert("Your average grade is: "+(averagetotal/numberofgrades)); 
} 

</script>

来源

2015-10-02 22:11:01

不，我用firefox和chrome试了一下。我发布整页代码。 –

尝试在Chrome上打开新标签 –

https：// jsfiddle。net/73nkothp /检查这个 –

级计算器的JavaScript未运行

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