Why C & C++, and Your First Program — Free C/C++ Tutorial

TL;DR: Learn Why C & C++, and Your First Program in C/C++ with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

Why C & C++, and Your First Program in C/C++

C (1972) is a small, fast, "close to the hardware" language — operating systems (Linux, Windows kernels), databases and embedded devices are written in it. C++ (1985) is C extended with classes and objects (OOP), templates and a huge standard library (the STL). Learning C first teaches you how memory and pointers actually work; C++ then adds powerful abstractions on top.

Unlike Python or JavaScript, C/C++ are compiled: a compiler (gcc / g++) translates your whole source file into a machine-code executable before it runs. This is why they are fast, but also why a small mistake is caught at compile time rather than while running. The classic toolchain is: write .c/.cpp → compile → run the produced binary.

Every C program starts executing at a function called main(). The return value of main (0) tells the operating system the program finished successfully. #include lines pull in libraries — stdio.h for input/output in C, <iostream> in C++.

#include <stdio.h>
int main(void) {
    /* statements */
    return 0;
}

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