Strings		Variables		Lists		Tuples		Dictionary
Control		Function		Files		Exceptions
Conditional		while loop
OOP		back

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for loop

• to iterate over a sequence of elements.
• to iterate over a sequence of values. 

for loop in range() method

• iterate through a sequence of numbers generated using the range function
• variable(x) will take each of the values in the sequence that loop iterates through.

  for x in range(5):
    print(x)
  #OUTPUT
  0
  1
  2
  3
  4
  

  for loop in a function

• use a for loop to sum the squares of the numbers in a range.

def square(n):
    """function to calculate the square of a number"""
    return n*n

def sum_squares(x):
    sum = 0
    for n in range(x):
        sum += int(square(n))
    return sum

print(sum_squares(10)) # Should be 285

[maybe add an user input?]