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The CSS :focus pseudo-class is used to apply styles to form elements when they receive focus (when a user clicks on them or navigates to them using the keyboard). This is particularly useful for improving user experience and accessibility. Syntax selector:focus { property: value; } Example The following example demonstrates how to use the :focus pseudo-class to highlight input fields with an orange background when they are focused − input:focus { ... Read More
A Strong Number is a number whose sum of the factorials of its digits equals the original number. For example, 145 is a strong number because 1! + 4! + 5! = 1 + 24 + 120 = 145. Syntax int factorial(int digit); int isStrongNumber(int number); Algorithm Extract each digit from the number starting from the unit place Calculate the factorial of each digit Sum all the factorials Compare the sum with the original number Example Let's implement a C program to check if a number is a Strong Number ... Read More
CSS selectors are patterns used to select and style HTML elements. They act as a bridge between your HTML structure and CSS styles, allowing you to target specific elements or groups of elements on your webpage. Syntax selector { property: value; } Types of CSS Selectors Selector Type Syntax Description Element Selector p Selects all elements of a specific type Class Selector .demo Selects all elements with class="demo" ID Selector #myid Selects the element with id="myid" Universal Selector * Selects ... Read More
Given a matrix as mat[row][column], our task is to check whether the given matrix is singular or not through a function and display the result. A singular matrix is a matrix whose determinant is zero. If the determinant is not zero then the matrix is non-singular. So to find whether the matrix is singular or non-singular we need to calculate determinant first. For a 3x3 matrix, the determinant can be calculated as − $$M1[3][3]\:=\:\begin{bmatrix}a & b & c \d & e & f \g & h & i \end{bmatrix}$$ |m1| = a(e*i - f*h) - b(d*i ... Read More
The descendant selector in CSS is used to match all elements that are descendants of a specified element. It allows you to apply styles to nested elements without affecting elements outside the parent container. Syntax ancestor descendant { property: value; } The descendant selector uses a space between the ancestor and descendant elements. It selects all descendant elements, regardless of how deeply nested they are within the ancestor. Example You can try to run the following code to implement CSS Descendant Selector − ... Read More
The CSS child selector (>) is used to select all elements that are direct children of a specified element. It only targets immediate children and does not select nested elements deeper in the hierarchy. Syntax parent > child { property: value; } Example The following example demonstrates how the child selector works − div > p { background-color: orange; padding: 10px; ... Read More
In C programming, computing the logarithm base 2 of a number n can be achieved using recursive or iterative approaches. The logarithm function determines the power to which a base must be raised to obtain a given number. The mathematical relationship is: if logb x = y, then by = x For example: log2 64 = 6, because 26 = 64 Syntax unsigned int log2n(unsigned int num); Method 1: Using Recursive Approach This method uses recursion to divide the number by 2 until it becomes 1 or less − #include ... Read More
The CSS float property is used to align elements to the left or right side of their container, allowing other content to wrap around them. This property was traditionally used for creating layouts before modern techniques like flexbox and grid. Syntax selector { float: value; } Possible Values ValueDescription leftElement floats to the left side rightElement floats to the right side noneElement does not float (default) Example: Right Float Alignment The following example demonstrates how to align an element to the right using the float property ... Read More
The product of ranges in an array problem involves calculating the product of elements between given left (L) and right (R) indices under modulo P. This is useful in competitive programming to handle large products efficiently. Syntax int calculateProduct(int A[], int L, int R, int P); Parameters A[] − The input array of integers L − Left index (1-based) R − Right index (1-based) P − Prime modulo value Algorithm Step 1: Convert 1-based indices to 0-based (L-1, R-1) Step 2: Initialize result as 1 Step 3: ... Read More
The CSS overflow-x property controls how content is handled when it overflows the horizontal boundaries of an element. It determines whether to show scrollbars, hide overflow content, or make it visible beyond the container's edges. Syntax selector { overflow-x: value; } Possible Values ValueDescription visibleContent overflows the container and remains visible (default) hiddenOverflow content is clipped and hidden scrollA scrollbar is always shown, even if content doesn't overflow autoScrollbar appears only when content overflows Example: Hidden Horizontal Overflow The following example demonstrates hiding horizontal overflow content ... Read More