What is the use of algorithm and flowcharts in cording

Answer 1

An algorithm can be anything.
Its a set of instructions that result in some sort of output.
Examples for algoritms:
-sorting algorithms
-search algorithms
~an algorithm that creates a map in a game
~an algorithm to find the prime-factors of (big-)numbers

Answer 2

They simplify the problem solving process. Algorithms help you avoid "reinventing the wheel" by having solutions or at least a process to solve the problem or parts of it. Flowcharts help you break down and plan out a solution to a problem, they're useful for showing how a code will work and they help when working with other people