$lt(less than) in Mongo

Filtering mongo document using $lt operator under Employee_Detail collection.

Example:

[
{ 
    "_id" : ObjectId("60179dd62381fc69d5f1c599"), 
    "Emp_Name" : "Andrew", 
    "Emp_Age" : NumberInt(22), 
    "Emp_Salary" : NumberInt(34000), 
    "Emp_Joining_Date" : ISODate("2020-07-03T18:30:00.000+0000")
}
{ 
    "_id" : ObjectId("60179dd62381fc69d5f1c59a"), 
    "Emp_Name" : "Sam", 
    "Emp_Age" : NumberInt(34), 
    "Emp_Salary" : NumberInt(34000), 
    "Emp_Joining_Date" : ISODate("2020-07-03T18:30:00.000+0000")
}
]

Approach

Query: Find employee having age less than 25.

db.Employee_Detail.aggregate(
{$match:{"Emp_Age":{$lt:25}}}
);

Output: 

[
{ 
    "_id" : ObjectId("60179dd62381fc69d5f1c599"), 
    "Emp_Name" : "Andrew", 
    "Emp_Age" : NumberInt(22), 
    "Emp_Salary" : NumberInt(34000), 
    "Emp_Joining_Date" : ISODate("2020-07-03T18:30:00.000+0000")
}
]