Introduction to computer programming: CPU help is processing the computer program.
Programming Languages
We need language to communicate with a computer too! A computer program is a set of instructions written in a programming language that tells a computer what tasks to perform. Programming language are set of rules that consist of instructions for computers. There are many programming languages like C++, C, python, JavaScript, Go, Verilog etc.
Python
Python is a high-level, general-purpose programming language. It emphasizes code readability using significant indentation.
C++
C++ is a compiled, statically typed, general-purpose programming language supporting multiple paradigms. It has imperative, object-oriented and generic programming features.
Source code
A computer program in its human-readable form is called source code. Here’s a simple C++ program displaying “Hello World”: Boiler plate
#include<iostream>
using namespace std;
int main(){
//your code goes here
cout << "Hello World";
return 0;
}Source code needs another computer program to execute because computers can only execute their native machine instructions. Therefore, Source code may be translated to machine instructions using the language’s compiler.
Machine language is a set of instructions executed directly by a computer’s central processing unit (CPU). Each instruction performs a very specific task, such as a load, a jump, or an ALU operation on a unit of data in a CPU register or memory. Every program directly executed by a CPU is made of a series of such instructions.
Program Execution When a program starts executing, then the operating system loads it into memory and starts a process. The CPU starts executing the instructions written in the program and any required data is also loaded into memory (RAM).