Grade Calculator JavaScript not running -


i attempted create grade calculator value of grades in javascript. no parts of code executed when code run. there blatant error in code's syntax? thanks, ben

var numberofgrades = prompt("how many grades want 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 "+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));

newest edited code-

var numberofgrades = prompt("how many grades want 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 "+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));

my syntax fixed issue, , running. having problems adding 2 numbers instead of program concatenating values. help, ben

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

here whole code. 

var numberofgrades = prompt("how many grades want 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 "+(countingvalue+1)+"st grade?");     grades.push(tempgrade);     countingvalue++; }     else if(countingvalue!=1){     var tempgrade= prompt("what "+(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));

you have syntax error. instead of

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

it should be

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

also instead of

var tempgrade= prompt("what "+countingvalue"th grade?")

it should be

var tempgrade= prompt("what "+countingvalue+"th grade?")

also instead of

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

it should be

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

and there seems problem brackets - missing } @ end


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