grades = [1, 2, 3, 4]

for grade in grades:
    print(grade)

print("")

for idx in range(len(grades)):
    print(grades[idx])

# range (start, stop, step)
for i in range(0, 10, 1):
    print(i)

grades = [1, 2, 3, 4]

for grade in grades:
    print(grade)

print("")

for idx in range(len(grades)):
    print(grades[idx])

# range (start, stop, step)
for i in range(0, 10, 1):
    print(i)

# range (start, stop, step)