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How to access json object array in javascript?

Syntax:

objectName[index].propertyName
or
objectName[index][“propertyName”]

Example:

<!DOCTYPE html>
<html>
<body>
 
<h2>Access json object array.</h2>
 
<p id="testDemo"></p>
 
<script>
 var textString = '{"students":[' +
  '{"firstName":"Sandy","lastName":"Sethi" },' +
  '{"firstName":"Roxy","lastName":"Malik" },' +
  '{"firstName":"Sunil","lastName":"Antil" }]}';
 
 var obj = JSON.parse(textString);
 document.getElementById("testDemo").innerHTML =
 obj.students[0].firstName + " " + obj.students[0].lastName;
</script>
 
</body>
</html>
]}

 
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