### Theory:

A conditional flowchart is used when a condition is imposed on a problem. The condition will either be true or false. The course of the problem depends on the answer to the condition.
The condition will be specified within the following shape:

Example:
1. A condition to check whether the train arrives on time or not.

2. A condition to check whether $$5$$ is a prime number or not.

Let us try to make a conditional flowchart for the following situation.

Situation:

Check if the given number is a multiple of $$3$$ or not.

We should begin with the step-by-step procedure first.

1. Input the number '$$n$$'.

2. Divide '$$n$$' be $$3$$.

3. If reminder equals $$0$$, print '$$n$$' is a multiple of $$3$$'.

4. If reminder does not equal to $$0$$, print '$$n$$' is not a multiple of $$3$$'.

Let us now come up with a conditional flowchart for the problem: