Program to find the sum of all even numbers between two given numbers using a while loop in Python:

 # take user input for the two numbers

start_num = int(input("Enter the start number: "))

end_num = int(input("Enter the end number: "))


# initialize sum variable

sum_even = 0


# use while loop to find even numbers and add them to the sum

while start_num <= end_num:

    if start_num % 2 == 0:

        sum_even += start_num

    start_num += 1


# print the sum of even numbers

print("The sum of even numbers between", start_num, "and", end_num, "is", sum_even)



In this program, we take user input for the two numbers between which we need to find the sum of even numbers. We initialize a variable sum_even to 0, which we will use to accumulate the sum of even numbers.

Next, we use a while loop to iterate over all numbers between the start and end numbers. For each number, we check if it is even by using the modulus operator % to check if it is divisible by 2. If it is even, we add it to the sum_even variable. Finally, we increment the value of the start number by 1 and continue the loop until we reach the end number.

After the loop completes, we print the sum of even numbers between the start and end numbers using a formatted string.

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