How to Insert/Fetch Account Record Using Standard Controllers and Extension in Visualforce Page

How to call extension method in visualforce

Creating Account Record and get the data from server Using Standard Controllers and Extension in Salesforce Visualforce Page

Building a Controller Extension

A controller extension is any Apex class containing a constructor that takes a single argument of type ApexPages.StandardController or CustomControllerName, where CustomControllerName is the name of a custom controller you want to extend. To know more about controller extension in Visualforce page

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