The read command is a builtin command that reads from the standard input. By default, it reads until a newline is received. The input is stored in one or more variables given as arguments: read var If more than one variable is given, the first word (the input up to the first space or tab)…
printf: formatting and printing data printf FORMAT ARG … The FORMAT string can contain ordinary characters, escape sequences, and format specifiers. Ordinary characters are printed unchanged to the standard output. Escape sequences are converted to the characters they represent. Format specifiers are replaced with arguments from the command line. Escape sequences are single letters preceded…
What is the 1-2-3 Trading Signal? It’s a bottom, a correction, retest that does not go beyond the original bottom, and then, rebound beyond the correction. Point 1: This is the bottom. Point 2: this is the correction. Point 3: This is the retest the DOES NOT GO BEYOND point 1. If it does then…
Microsoft Access is a Database Management System (DBMS) from Microsoft that combines the relational Microsoft Jet Database Engine with a graphical user interface and software-development tools. It is a member of the Microsoft Office suite of applications, included in the professional and higher editions. MS Access Objects MS Access uses “objects” to help the user…
Visual Studio Code is a free programming software. It is multiple platforms software that you can install it on Windows, Linux and Mac OS. As a Python programmer, working on Visual Studio Code saves much time. However, Visual Studio Code only provides basic Python packages that are not enough for advanced programming. This screenshot shows…
Here is the final solution of solving “Network initialization failed” generated by Parallels 16 in Big Sur. What is Parallels 16? In order to run many operation systems in Mac OS Big Sur, such as Windows 10, Ubuntu, Centos, etc., Parallels 16 is the fastest, easiest and the most powerful application with no need rebooting.…
SELECT – extracts data from a database UPDATE – updates data in a database DELETE – deletes data from a database INSERT INTO – inserts new data into a database CREATE DATABASE – creates a new database ALTER DATABASE – modifies a database CREATE TABLE – creates a new table ALTER TABLE – modifies a table DROP TABLE – deletes a table CREATE INDEX –…
The latest version of Python is 3.9.2 on the date of posting this tutorial that shows how to install Python on Ubuntu. Installing Python 3.9 on Ubuntu with Apt Installing Python 3.9 on Ubuntu with apt is a relatively straightforward process and takes only a few minutes to complete. Update the packages list and install…
If a, b, and c are real numbers, the graph of an equation of the form ax + by = c is a straight line (if a and b are not both zero), so such an equation is called a linear equation in the variables x and y. However, it is often convenient to write…
The outbreak of pneumonia caused by the new coronavirus has posed a serious threat to people’s health. However, the prevention and control of such a sudden outbreak requires more scientific knowledge and the participation of the public, so that the disease can be defeated and the epidemic can be controlled. “New coronavirus pneumonia prevention manual”…