cse160_checkin1

py

School

University of Washington *

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Course

160

Subject

Computer Science

Date

Dec 6, 2023

Type

py

Pages

2

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# Name: # CSE 160 # Autumn 2023 # Checkin 1 # Problem 1 def sum_evens(nums): ''' Takes in a list of integers and returns the sum of the even ints in the given list. Note: the % "mod" operator computes the remainder, e.g. 5 % 2 is 1. Arguments: nums: a list of integers. Returns: a integer representing the sum of the even numbers in the list ''' # your solution code should start here counter = 0 for i in nums: if (i % 2) == 0: counter = counter + i return counter assert sum_evens([5, 2, 6, 3, 4]) == 12 assert sum_evens([3, 6, 11, 2, 5]) == 8 assert sum_evens([]) == 0 assert sum_evens([7]) == 0 assert sum_evens([5, 8, 5]) == 8 assert sum_evens([72, 2, 6, 1]) == 80 assert sum_evens([6]) == 6 assert sum_evens([4, 4, 4]) == 12 assert sum_evens([1, 1, 1, 2]) == 2 # Problem 2 def hidden_char(input_str, hidden_char): ''' Returns True if string hidden_char is found in the given string. You may not use the keyword 'in' Arguments: input_str: a string hidden_char: the character to look for in input_str Returns: A boolean representing whether or not hidden_char is in input_str ''' # your solution code should start here for char in input_str: if char == hidden_char: return True return False assert hidden_char('cse160', 's') is True assert hidden_char('c', 'c') is True assert hidden_char('a', 'b') is False assert hidden_char('coding', 'g') is True assert hidden_char('I love python', 'z') is False assert hidden_char('Snakes', 's') is True
assert hidden_char('123', 'g') is False assert hidden_char('', 'a') is False # Problem 3 def count_num(nums, find_num): ''' Return the number of times the number find_num occurs in the given list Arguments: nums: a list of ints find_num: the integer to count the occurences of in nums Returns: A integer representing the number of times find_num appears in nums ''' # your solution code should start here count = 0 for num in nums: if num == find_num: count += 1 return count assert count_num([1, 5, 6, 2, 1], 1) == 2 assert count_num([], 4) == 0 assert count_num([1, 2, 3], 1) == 1 assert count_num([4, 5, 6], 2) == 0 assert count_num([160], 160) == 1 assert count_num([90], 25) == 0 assert count_num([5, 5, 5], 5) == 3 assert count_num([3, 6, 12, 9, 12], 12) == 2
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