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.
Given a number N, the task is to display all the odd numbers from 1 to N and their sum.
Examples:
Input: 3 Output: 1, 3 Input: 5 Output: 1, 3, 5
Approach is to initialize a num with 1 and sum with 0 and keep incrementing num by 2 and sum by num until num
-- display all odd number from 1 to n DECLARE -- declare variable num
num NUMBER(3) := 1;
sum1 NUMBER(4) := 0;
BEGIN WHILE num <= 5 LOOP
-- display odd number
dbms_output.Put_line(num);
-- the sum of all odd numbers
sum1 := sum1 + num;
--next odd number
num := num + 2;
-- end loop
END LOOP;
dbms_output.Put_line( 'Sum of all odd numbers is ' || sum1);
END ;
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Output:
1 3 5 Sum of all odd numbers is 9
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