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 Map class's object contains key and value pairs. You can convert it into two list objects one which contains key values and the one which contains map values separately. To convert a map to list − Create a Map object. Using the put() method ... 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

Data-link layer uses error control techniques to ensure that frames, i.e. bit streams of data, are transmitted from the source to the destination with a certain extent of accuracy.ErrorsWhen bits are transmitted over the computer network, they are subject to get corrupted due to interference and network problems. The corrupted ... Read More

A stack is an abstract data structure that contains a collection of elements. Stack implements the LIFO mechanism i.e. the element that is pushed at the end is popped out first. Some of the principle operations in the stack are −Push - This adds a data value to the top ... Read More

We cannot imagine our night sky without the bright moon. It adds the whole lot of beauty to the nights and has been the main subject for romantic poets for ages.Coming to the science, without the Moon, Earth will not have the steady tilt and scientists say that life on ... Read More