Stack Operations

In this section, we will explore the common operations performed on a stack. A stack supports three primary operations:

• Push: Adds an element to the top of the stack
• Pop: Removes and returns the top element from the stack
• Peek: Returns the top element from the stack without removing it

These operations are essential for manipulating the stack and implementing various algorithms and data structures.

Let's start by understanding the push operation.

1// Push operation
2void push(int value) {
3  // Add implementation here
4}

The push operation adds an element to the top of the stack. It takes the element to be added as a parameter and inserts it into the stack. The push operation may fail if the stack is already full, in which case an error can be returned or an exception can be thrown.

Next, let's move on to the pop operation.

1// Pop operation
2int pop() {
3  // Add implementation here
4  return 0; // return the popped element
5}

The pop operation removes and returns the top element from the stack. It takes no parameters and modifies the stack by removing the top element. The pop operation may fail if the stack is empty, in which case an error can be returned or an exception can be thrown.

Finally, let's discuss the peek operation.

1// Peek operation
2int peek() {
3  // Add implementation here
4  return 0; // return the top element
5}

The peek operation returns the top element from the stack without removing it. It takes no parameters and simply returns the value of the top element. The peek operation does not modify the stack.

Understanding these basic stack operations is crucial for utilizing stacks effectively in various scenarios. In the next section, we will explore real-world applications of stacks and see how they are used in practice.