Following is the syntax to display array valuesdo{    //statement1    //statement2    .    .    .    n } while(yourCondition);The PHP code is as follows −Example Live Demo OutputJohn David Mike Sam Carol

If you try to use ++ operator with string value then it increments the last character value with 1 and prints the ASCII value.Following is the PHP code −Example Live Demo OutputThe string modified value is=Joho The string incremented value is=11.5

To get the correct length, use mb_strlen() for Unicode characters.The PHP code is as follows −Example Live DemoOutputThe string length with mb_strlen=9 The string length with strlen=10

This is because if you use && both conditions must be true. If any one condition becomes false then the overall condition evaluates to false.The PHP code is as follows −Example Live Demo OutputThe above condition is true

Suppose we have a picture consisting of black and white pixels, we have to find the number of black lonely pixels. Here the picture is represented by a 2D char array consisting of 'B' and 'W', for the black and white pixels respectively.A black lonely pixel is actually 'B' that located at a specific position where the same row and same column don't have any other black pixels.If the input is like −WWBWBWBWWOutput will be 3. Because all the three 'B's are black lonely pixels.To solve this, we will follow these steps −n := size of picturem := (if n ... Read More

Suppose we have a node in a binary search tree, we have to find the in-order successor of that node in the BST. If there is no in-order successor, return null. As we know that the successor of a node is the node with the smallest key greater than value of node.We will have direct access to the node but not to the root of the tree. Here each node will have a reference to its parent node. Below is the definition for Node −class Node {    public int val;    public Node left;    public Node right;   ... Read More

Suppose there is a ball in a maze with empty spaces and walls. Now the ball can go through empty paths by rolling any direction like up, down, left or right, but it won't stop rolling until hitting a wall. When the ball stops, it could choose the next direction.We have to start position of ball, the destination and the maze, we have to find the shortest distance for the ball to stop at the destination. Here the distance is actually defined by the number of empty cells, that are covered by the ball (Excluding start position, including starting position). ... Read More

Suppose there is a ball in a maze with empty spaces and walls. Now the ball can go through empty paths by rolling any direction like up, down, left or right, but it won't stop rolling until hitting a wall. When the ball stops, it could choose the next direction.We have to start position of ball, the destination and the maze, we have to check whether the ball could stop at the destination. The maze is represented by one 2D array. Here 1 indicates the wall and 0 indicates the empty space. The borders of the maze are all walls. ... Read More

Suppose we have a binary array; we have to find the maximum number of consecutive 1s in this array if we can flip at most one 0.So, if the input is like [1, 0, 1, 1, 0], then the output will be 4 because if we flip the first zero will get the maximum number of consecutive 1s. After flipping, the maximum number of consecutive 1s is 4.To solve this, we will follow these steps −ret := 1, n := size of numsif not n is non-zero, then −return 0j := 0, zero := 0for initialize i := 0, when ... Read More

Suppose we have a secret signature consisting of character 'D' and 'I'. 'D' denotes the decreasing relationship between two numbers, 'I' denotes increasing relationship between two numbers. And the secret signature was constructed by a special integer array, which contains uniquely all the different number from 1 to n.For example, the secret signature "DI" can be constructed from an array like [2, 1, 3] or [3, 1, 2], but not be constructed using array like [3, 2, 4] or [2, 1, 3, 4], which are both illegal constructing special string that can't represent the "DI" secret signature.Now we have to ... Read More