Variables such as integers can be represent in two ways, i.e., signed and unsigned. Signed numbers use sign flag or can be distinguish between negative values and positive values. Whereas unsigned numbers stored only positive numbers but not negative numbers.Number representation techniques like: Binary, Octal, Decimal, and Hexadecimal number representation ... Read More

In Intel 8051, there are two 16-bit timer registers. These registers are known as Timer0 andTimer1. The timer registers can be used in two modes. These modes areTimer mode and the Counter mode. The only difference between these two modes is the source for incrementing the timer registers. Timer ModeIn the ... Read More

In this section, we will see how to connect a stepper motor with Intel 8051 Microcontroller. Before discussing the interfacing techniques, we will see what are the stepper motors and how they work.Stepper MotorStepper motors are used to translate electrical pulses into mechanical movements. In some disk drives, dot matrix ... Read More

The reflected binary code or Gray code is an ordering of the binary numeral system such that two successive values differ in only one bit (binary digit). Gray codes are very useful in the normal sequence of binary numbers generated by the hardware that may cause an error or ambiguity ... Read More

There are several methods to check that string is an int or not and one of those method is to use isdigit() to check the string.Here is an example to check whether a string is an int or not in C++ language, Example Live Demo#include #include using namespace std; int ... Read More

A substring is a part of a string. A function to obtain a substring in C++ is substr(). This function contains two parameters: pos and len. The pos parameter specifies the start position of the substring and len denotes the number of characters in a substring.A program that obtains the ... Read More

To select the row value containing string in MySQL, use the following syntax.SELECT *FROM yourTableName where yourColumnName like ‘%yourPattern%’;To understand the above syntax, let us first create a table. The query to create a table is as follows.mysql> create table PatternDemo -> ( -> Id int, -> Name varchar(100), -> ... Read More

The stack is a LIFO (last in, first out) data structure implemented in the RAM area and is used to store addresses and data when the microprocessor branches to a subroutine. Then the return address used to get pushed on this stack. Also to swap values of two registers and ... Read More

To test whether a row exists in a MySQL table or not, use exists condition. The exists condition can be used with subquery. It returns true when row exists in the table, otherwise false is returned. True is represented in the form of 1 and false is represented as 0.For ... Read More

Here is the program to convert a string to uppercase in C language, Example Live Demo#include #include int main() {    char s[100];    int i;    printf("Enter a string : ");    gets(s);    for (i = 0; s[i]!='\0'; i++) {       if(s[i] >= ... Read More