how to use = and >= in for and while loops

I am new to python and I am try to understand why the following breaks and how to do this better:

x = [5,5,5,5,6,7,87,8,9,10]
for i in range(len(x)):
    while i == 5:
        print('5')
    else:
        print('no')

-This code runs forever producing 5's

for i in range(len(x)):
    while i = 5:
        print('5')
    else:
        print('no')

-This breaks

for i in range(len(x)):
    while i => 5:
        print('5')
    else:
        print('no')

-This breaks

How do I program a simple loop to print '5' if the value of i is 5 and print 'no' in the other instances? how do I use signs like = and >= in loops? Python seems not to recognize them