**Prerequisite **– PL/SQL introduction

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.

Here, first, we take three variables x, y, and z and assign the value in x and y and after addition of both the numbers, we assign the resultant value to z and print z.

Examples:

Input : 15 25 Output : 40

Input : 250 400 Output : 650

Below is the required implementation:

`declare` ` ` `-- declare variable x, y ` `-- and z of datatype number ` `x number(5); ` `y number(5); ` `z number(7); ` ` ` `begin` ` ` `-- Here we Assigning 10 into x ` `x:=10; ` ` ` `-- Assigning 20 into x ` `y:=20; ` ` ` `-- Assigning sum of x and y into z ` `z:=x+y; ` ` ` `// Print the Result ` `dbms_output.put_line(` `'Sum is '` `||z); ` `end` `; ` `/ ` `-- Program End ` |

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**Output :**

Sum is 30

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