How to define global variable in a JavaScript function?

To declare a global variable, use the var at global scope −

<script>
   var myGlobalVariable;
   function display() {
      //
   }
</script>

For JavaScript function, assign the property to a window −

<script>
   function display() {
      window. myGlobalVariable = …;
   }
</script>

Sravani S

Updated on: 23-Jun-2020

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