我如何使用math.sqrt进行计算正确？

Question

I just want to get the square root of total2 .. but it won't appear in the selected box .. here is the javascript codes. i'll comment the html codes.

 function myFunction() { var q1 = document.getElementById("qinput1").value; var q2 = document.getElementById("qinput2").value; var q3 = document.getElementById("qinput3").value; var total = parseInt(q1) + parseInt(q2) + parseInt(q3); document.getElementById("ainput3").value=total; var a1 = document.getElementById("ainput1").value; var a2 = document.getElementById("ainput2").value; //from the total we got, lets assign it a variable for further calculation var a3 = document.getElementById("ainput3").value=total; var total2 = parseInt(a1)*parseInt(a2)/ parseInt(a3); document.getElementById("ansA").value = total2; var total3 = math.sqrt(parseInt(total2)); document.getElementById("sqaureD").value = total3; } function myShapes() { document.getElementById('squareA').style.display = document.getElementById('shapes').value == 'Square' ? 'block' : 'none' } 

 <form action="" id="fcalculation"> <fieldset> <legend>Calculation of qu</legend> <label><i>Ultimate bearing capacity</i> <b>(qu) = </b></label> <input id="qinput1" type="text" placeholder="c'NcFcsFcdFci"/> + <input id="qinput2" type="text" placeholder="qNqFqsFqdFqi"/> + <input id="qinput3" type="text" placeholder="½βγNFγsFγdFγi"/> </fieldset> </form> 

it seems that the calculation part at the very end is not working. sorry its my first time to code.

Answer 1

Classname is Math not math

Try replacing

var total3 = math.sqrt(parseInt(total2,10));

with

var total3 = Math.sqrt(parseInt(total2,10));

Also, looking at your markup, there are no fields with id ainput1 , ainput2 and ainput3 .