.right() is used to get last n char from a String using Apex.
.left() is used to get first n char from a String using Apex.
Example:
String str = 'SalesforceCloudwaale';
String result = str.right(10); //returns Cloudwaale
String str = 'SalesforceCloudwaale';
String result = str.left(10); //returns Salesforce
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