Salesforce Apex is the world’s Strongest typed programming language developed by Salesforce.com.
In Salesforce , Apex is an object oriented language similar to C# and Java It allows to implement complex business requirements and transactions on the force.com platform.
Salesforce Apex is Mainly designed For large amounts of data to add business logic to applications and to write Controller in the MVC architecture.
Declarative programming and Programmatic development are the two Application development types in Salesforce.
Salesforce Apex programming language comes under Programmatic development.
After developing User Interface for an application, as a Salesforce developer it is essential to add custom logic to your application and write controller code using Salesforce Apex Programming language.