BT2

// SPDX-License-Identifier: MIT
pragma solidity >= 0.7.0;

contract Student_management
{

struct Student
{
	int stud_id;
	string Name;
	string Department;
}

Student[] Students;

function add_stud(int stud_id, string memory Name, string memory Department) public
{
	Student memory stud = Student(stud_id, Name, Department);
	Students.push(stud);
}

function getStudent(int stud_id) public view returns(string memory, string memory)
{
	for(uint i = 0; i < Students.length; i++)
    {
		Student memory stud = Students[i];
		if(stud.stud_id == stud_id)
        {
			return(stud.Name, stud.Department);
		}
	}
    return("Name Not Found", "Department Not Found");
}

//Fallback Function
//It is executed whenever the contract receives plain Ether without any data
fallback() external payable
{
	Students.push(Student(7, "XYZ", "Computer Science"));
}
// the fallback function simply sends a message to the sender of the transaction to let them know that the transaction was received. 
receive() external payable
{
}

// When ether is sent to a contract with no calldata.

}