Contents
- more_range_examples.py
- our_for_examples.py
- our_solutions.py
- range_analysis.py
- simple_for.py
- sum5.py
- using_range.py
more_range_examples.py 1/7
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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)
# For 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)
our_for_examples.py 2/7
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# Solutions to our examples of using the for loop
# CSCI111
print("First Solution")
for x in range(1, 6, 1):
print(x)
# Alternative
print("Second Solution")
for x in range(1, 6):
print(x)
# Alternative
print("Third Solution")
for x in range(5):
print(x+1)
print("Solution for problem b")
# alternatively, stop could be 12 or 13
for anything in range(2, 14, 3):
print(anything)
print("Solution for problem c")
stars = "****"
for i in range(3):
print(stars)
our_solutions.py 3/7
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# Solutions to problems on slide
# by CSCI111
print("for a to display 1,2,3,4,5")
for i in range(1, 6):
print(i)
print()
for x in range(5):
print(x+1)
print()
print("for b to display 2, 5, 8, 11")
for i in range(2, 12, 3):
print(i)
print()
for var in range(2, 14, 3):
print(var)
print()
print("for c to display ****, ****,****")
for i in range(3):
print("****")
range_analysis.py 4/7
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# Example of for loops using range
# by Sara Sprenkle
# Question: what does range do?
for variable in range(5):
print(variable)
print("After the loop:", variable)
# QUESTION FOR CLASS:
# How is i changing each time through the loop?
# What happens if you change the variable from
# i to some other variable name?
simple_for.py 5/7
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# Examples of for loops using range
# by Sara Sprenkle
# The "chorus" gets repeated 3 times
for i in range(3):
print("You say 'hello'")
print("And, I say 'goodbye'...")
print()
num_repetitions = 5
# 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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# Adding up 5 numbers from the user --> not yet complete
# By CSCI111
total = 0
# repeat 5 times
for num in range(5):
# asking for input
n = int(input("Enter a number: "))
# adding the user's input to our sum
total = total + n
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(1,10,2) -------------")
for x in range(1, 10, 2):
print(x)
# What happens if step is negative?
# What happens if stop < start?
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