Contents
- average5.py
- more_range_examples.py
- new_for.py
- range_analysis.py
- simple_for.py
- sum5.py
- using_range.py
average5.py 1/7
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# This program averages numbers supplied by the user.
# By CS111, 01.18.2012
print("This program will average numbers given by the user.")
how_many_numbers = eval(input("How many numbers do you want to average? "))
# initializes the accumulater variable, a running total
sum = 0
for x in range(how_many_numbers):
userNum = eval(input("Enter a number: "))
# add the current number to the running total
sum = sum + userNum
# calculate the average
average = sum/how_many_numbers
# display the result
print("The average is", average)
more_range_examples.py 2/7
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# More range examples
# Sara Sprenkle
print("-------------- range(1, 15, 3) ------------")
for a in range(1,15,3):
print(a)
print("-------------- range(5, -15, -5) ------------")
for b in range(5, -15, -5):
print(b)
# Demonstrate these after handout ...
# Won't display anything
print("-------------- range(5, -15, 5) ------------")
for counter in range(5, -15, 5):
print(counter)
# Won't display anything
print("-------------- range(-5, 15, -5) ------------")
for counter in range(-5, 15, -5):
print(counter)
print("-------------- range(5.5, 15, 1.5) ------------")
# Note that range expects integer values
for counter in range(5.5, 15, 1):
print(counter)
new_for.py 3/7
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# More range examples
# Sara Sprenkle
print("-------------- range(1, 15, 3) ------------"
for a in range(1,15,3):
print(a)
print("-------------- range(5, -15, -5) ------------"
for b in range(5, -15, -5):
print(b)
# Demonstrate these after handout ...
# Won't display anything
print("-------------- range(5, -15, 5) ------------"
for counter in range(5, -15, 5):
print(counter)
# Won't display anything
print("-------------- range(-5, 15, -5) ------------"
for counter in range(-5, 15, -5):
print(counter)
print("-------------- range(5, 15, 1.5) ------------"
# Note that range expects integer values
for counter in range(5.5, 15, 1):
print(counter)
range_analysis.py 4/7
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# Example of for loops using range
# by Sara Sprenkle
# Question: what does range do?
for i in range(10):
squared = i * i
print(i , "^2 =", squared)
print(i)
# QUESTION FOR CLASS:
# How is i changing each time through the loop?
simple_for.py 5/7
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# Examples of for loops using range
# by Sara Sprenkle
# The "chorus" gets repeated 5 times
for i in range(3):
print("You say 'hello'")
print("And, I say 'goodbye'...")
num_repetitions = 5
print()
# for loop with only one statement that gets repeated
for x in range(num_repetitions): print("Repeat the chorus!")
sum5.py 6/7
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# This program adds up 5 numbers from the user.
# By CS111, 01.18.2012
print("This program will add up 5 numbers given by the user.")
# initializes the accumulater variable, a running total
sum = 0
# repeat 5 times
for x in range(5):
# prompts the user for the number
userNum = eval(input("Enter a number: "))
# add the current number to the running total
sum = sum + userNum
# Alternatively: sum += userNum
# display the result
print("The total sum is", sum)
using_range.py 7/7
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# Examples of using range, with different numbers of parameters
# by Sara Sprenkle
#
print("------------ range(10) ------------")
for x in range(10):
print(x)
print("----------- range(5,10) -----------")
for y in range(5, 10):
print(y)
print("----------- range(1,10,1) -------------")
for x in range(1, 10, 1):
print(x)
# What happens if step is negative?
# What happens if stop < start?
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