What is output of “20” + 20 + 20 and “20” + ( 20 + 20)? In javascript?

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Is javascript hard to learn?

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Why is javascript called richer interface?

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The below script is working Internet browser but not working in mozilla plz find that good way... function doSubmit(op){ var rowcount=document.getElementsByName ("parameterTypeId").length; var parameterGrade; var performance; var goal; if(op == "save"){ for (var i=0; i < rowcount; i++) { var param=eval("document.forms [0].parameterGrade"+i); if(param.value != "select"){ return true; } } alert("Please rate atleast one attribute"); return false; }//if ends here

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What is the difference between let and var?

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Write a Program of Simple Calculator in JavaScript using HTML.

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Which built-in method returns the index within the calling string object of the first occurrence of the specified value?

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What is object cloning

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What is the output of 10+20+”30″ in JavaScript?

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Create an array in javascript with a list of 4 colors, assign that array to the variable, ‘colors’.

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What are the new ways to define a variable in Javascript?

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How to convert json string to object?

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