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# Count odd and even digits in a number in PL/SQL

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 and task is to find the number of odd and even digits present in the number.

Examples:

```Input: 123456
Output: Odd digits = 3
Even digits = 3

Input: 246
Output: Odd digits = 0
Even digits = 3```

Approach is to take a number and one by one check its digits, if it is odd or even.
Below is the required implementation:

## SQL

 `--Odd and Even digits in a number ` `--in PL/SQL ` `DECLARE` `  ``--num variable declared ` `  ``--num assign with a number ` `  ``num NUMBER := 123456; `   `  ``--len variable char declared ` `  ``len VARCHAR2(20); `   `  ``--cntvariable declared ` `  ``cnt1 NUMBER(5) := 0; ` `  ``cnt2 NUMBER(5) := 0; ` `BEGIN`   `  ``--for loop go from 1 to length of the number ` `  ``FOR` `i ``IN` `1..Length(num) ` `  ``LOOP ` `    ``len := Substr(num, i, 1); ` `    ``IF mod(len, 2) != 0 ``THEN` `      ``cnt1 := cnt1 + 1; ` `    ``ELSE` `      ``cnt2:=cnt2+1; ` `    ``END` `IF; ` `  ``END` `LOOP;` `  ``--end loop `   `  ``dbms_output.Put_line(``'Odd Digits: '` `  ``|| cnt1); ` `  ``dbms_output.Put_line(``'Even Digits: '` `  ``|| cnt2); ` `  ``--display result ` `END``; ` `--end program`

Output:

```Odd Digits: 3
Even Digits: 3```
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