Sum of lower triangular program | C language

Q : Write a ‘C’ Program to find Sum of lower triangular elements in a matrix.

Answer : 

Lower triangular

Lower triangular matrix is a special square matrix whole all elements above the main diagonal is zero.

Delete a number by given position from array program | C Language

Q : Write a program to delete an element from a given location of an array of integers.

Answer : 

#include<stdio.h>

#include<conio.h>

#define MAX 50

/*============================

     Girfa Student Help

     Remove from array by given index

==============================*/

Link List vs Array

Q :Define array and link list. Give one example for each showing its usage

Answer :

Define Link List

struct node

{

     int data;

     struct node *next;

}

int ar[5];

Whatsapp button for website

Add whatsup button at bottom right side of your website. Button will show when user scroll down because it can disturb your home page opening view. When user will click on whatsapp button it will redirect to whatsapp message mode to the given number.

<style>

    /* ========= CSS ==========*/

    .g-whatsapp {

        display: none;

        position: fixed;

        bottom: 20px;

        right: 30px;

        z-index: 99;

        cursor: pointer;

    }

</style>