Differentiate between an algorithm, program and a flow chart?

Algorithm: is a set of rules or instructions that is well defined step-by-step which is used to get a solution for a problem or an expected results.

Program: is a collection of instructions that can be executed by a computer to perform a specific task and it usually written in a programming language.

Flow chart: is a diagram created by different geometric shapes and flowchart is a representation of an algorithm. Programmers often use it as a program-planning tool to solve a problem. It is easier to understand flowchart more than algorithm.