4. Some examples

• Make a program that reads a vector of 5 integers and displays the vector.

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vector = []

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i = 1

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while i <= 5:

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    n = int(input("Enter a number: "))

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    vector.append(n)

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    i = i + 1

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print("Read vector:", vector)

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​

Activity: 4.1 ActiveCode (ac_l17_4a_en)

• Make a program that reads a vector of ten real numbers and displays them in reverse order.

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vector = []

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i = 1

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while i <= 10:

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    n = float(input("Enter a number: "))

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    vector.append(n)

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    i += 1

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i = 9

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while i >= 0:

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    print(vector[i])

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    i -= 1

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​

Activity: 4.2 ActiveCode (ac_l17_4b_en)

• Make a program that reads four grades, displays the grades, and the average on the screen.

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grades = []

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i = 1

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while i <= 4:

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    n = float(input("Grade: "))

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    grades.append(n)

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    i += 1

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suma = 0

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i = 0

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while i <= 3:

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    suma += grades[i]

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    i += 1

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print("Grades:", grades)

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print("Average: %4.2f" % (suma / 4))

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​

Activity: 4.3 ActiveCode (ac_l17_4c_en)

• Another way of doing the same thing.

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 grades = []

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 i = 1

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 suma = 0

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 while i <= 4:

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     n = float(input("Grade: "))

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     grades.append(n)

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     suma += n

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     i += 1

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 print("Grades:", grades)

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 print("Average: %4.2f" % (suma / 4))

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​

Activity: 4.4 ActiveCode (ac_l17_4d_en)

• Make a program that reads a vector of 10 lowercase characters, and tells how many consonants were read.

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letters = []

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i = 1

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while i <= 10:

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    letters.append(input("Letter: "))

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    i += 1

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i = 0

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cont = 0

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while i <= 9:

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    if letters[i] not in "aeiou":

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        cont += 1

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    i += 1

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print("%d consonants were read" % cont)

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​

Activity: 4.5 ActiveCode (ac_l17_4e_en)

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