👉 In software development, a "postcondition" is a condition that must be met before an operation can complete. This condition is often used to determine whether the program's execution has reached its goal or not. For example, in a function that calculates the sum of two numbers, a "postcondition" might be that the sum should equal the input values. If the sum does not equal the input values at any point during the execution of the function, the function will fail to complete and may return