In PL/SQL code groups of commands are arranged within a block. A block group related declarations or statements.
In declare part, we declare variables and between begin and end part, we perform the operations.
Basic structure of pl/sql block
declare -- declare all the variables begin -- for start block -- make a program here end -- for end block
You have given two numbers num1 and num2 the your task is to swap the value of given numbers.
Input : num1 = 1000 num2 = 2000 Output : num1 = 2000 num2 = 1000 Input : num1 = 40 num2 = 20 Output : num1 = 20 num2 = 40
before num1 = 1000 num2 = 2000 after num1 = 2000 num2 = 1000