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String Variables in Apex

What is a String?

The String data type is used to represent a sequence of characters, such as text. Any set of characters enclosed in single quotes (' ') is considered a string.

It is a primitive data type that can store letters, numbers, and special characters. Strings are commonly used for storing names, addresses, and other text-based information.

How to Declare a String?

To declare a string in Apex:

  1. Use the keyword string.
  2. Follow it with a variable name (choose something meaningful).
  3. Assign a value using = and wrap the value in single quotes (' ').
  4. End the line with a semicolon (;).
String
myString
=
'Hello, Decodeforce!'
;
String myString = 'Hello, Decodeforce!';

In the above example:

  • The keyword string is used to declare a string variable.

  • The variable name myString is used to name the string.

  • The value 'Hello, Decodeforce!' is assigned to the variable myString.

Note

The default value for a string in apex is null. Always initialize your string variables before performing any operations to avoid null pointer exceptions.

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