C++ pow() Function Explained With Compound Interest

Learn how to write a C++ program to calculate compound interest using the pow function from cmath. A clean, beginner-friendly walkthrough. In this video, we build a small C++ program that calculates compound interest step by step. We start with the core formula, A equals P times one plus R over 100, raised to the power of T, then translate it directly into C++ code. You will see why we use double instead of int for financial calculations, how the pow function from the cmath header handles the exponent in a single line, and how the money grows year after year as interest compounds on the new total. We also trace the calculation by hand so the output of the program makes complete sense. Tested on: g++ 14, C++17, Ubuntu 24.04 📚 If you enjoy reading on self-improvement, relationships, or business, check out my ebooks on Apple Books: https://books.apple.com/us/author/shafaat-ali/id1529601234 #CPlusPlus #CompoundInterest #ProgrammingTutorial #LearnToCode #BeginnerCoding

Added 28 May 2026