for шагом 1:

for x in range(-10, 11):
y = x**2 - 1
print(f'x = {x}, y = {y}')

while шагом 0.1:

x = -10
while x <= 10:
y = x**2 - 1
print(f'x = {x}, y = {y}')
x += 0.1