Final answer:
To find the largest of three unique numbers x, y, and z in Python, use nested if and else statements to compare them pairwise and print the largest value.
Step-by-step explanation:
To determine the largest value among three unique variables x, y, and z using Python, you can use a series of if and else statements to compare the variables two at a time and print out the largest value. Here is a simple way to code this:
if x > y:
if x > z:
print('The largest value is:', x)
else:
print('The largest value is:', z)
else:
if y > z:
print('The largest value is:', y)
else:
print('The largest value is:', z)
This code snippet effectively compares each variable pairwise to determine which is the largest without using any lists or built-in functions such as max(). It adheres to the condition of using binary relational operators to compare two values at a time, like x > y.