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Kata description:
In this simple assignment you are given a number and have to make it negative. But maybe the number is already negative?
Example:
Kata.MakeNegative(1); // return -1
Kata.MakeNegative(-5); // return -5
Kata.MakeNegative(0); // return 0
Notes:
The number can be negative already, in which case no change is required.
Zero (0) is not checked for any specific sign. Negative zeros make no mathematical sense.
Ok so this kata asks me to make any number into a negative, I know I can do it with if, but I wanna see it work this way:
def make_negative( number ):
number = ((number)*(-1))
return number
When I test it works, but when I attempt it I get this: "9 should equal -9" even though it's a basic test case that I passed earlier (I also get the same error on the random test cases). Any ideas?
To make an always negative result I'g suggest the use of abs combied with the -1 multiplication
def make_negative(number):
return -1 * abs(number)
print(make_negative(10)) # -10
print(make_negative(-10)) # -10
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I'm struggling to implement a program that prompts the user for an arithmetic expression,
(for example; 1 + 1) and then calculates and outputs the result as a floating-point value formatted to one decimal place (for example; 2.0).
Also, I want there to be a space between x and y, and a space between y and z in the equation (for example; 1 + 1, with spaces between each character).
This is basically my desired output (in a terminal):
https://i.stack.imgur.com/5LuRH.png
I'm pretty new to python so this will probably seem easier to more experienced coders, but anyone have any ideas, and thanks in advance.
You can just simply use eval directly on the expression inserted...
expression = str(input('Expression: '))
print("{:.1f}".format(eval(expression), 1))
output:
Expression: 1 + 1
2.0
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Id codes at a company come in the form x-y-zzzzzz, where x is a digit and y is a letter and zzzzzz represents a string of 6 letters. Write a function which takes in a code as an input (e.g. 3-a-abaabb) and returns the zzzzzz part (e.g. abaabb).
I have no idea how to start and solve this question. any help would be much appreciated. My IDE is pycharm (solving python coding problems) I basically need to create a function which takes the code as an input and will return the last 6 letters
You can use str.spit('-') then search count in code with repeat is equal or not, like below:
def fnd_code(code):
repeat, char, search = code.split('-')
return search.count(char) == int(repeat)
print(fnd_code('3-a-abaabb'))
print(fnd_code('4-a-abaabb'))
Output:
True
False
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I've coded a check for integers which returns a boolean value:
def NoZerosFives(n: str):
if '0' in n or '5' in n: #It checks if any of the digits is 0 or 5
return False
return True
which I then put in a script:
for n in range(10**20000, 10**100000000):
d = str(n)
if NoZerosFives(d):
pass
else:
print('Failed the check.')
n is obviously extremely large, and the else:print('Failed the check.') is here just to tell me if the script's going or not, but it's not printing anything.
My first thought is that the problem is not with Python but with my hardware (I have a pretty powerful laptop, but still a laptop). Is my computer not powerful enough? Should I have done something to my PC that I didn't do?
Or is the code not fit for the objective and I just need to do something different?
As #jordanm points out in a comment, NoZerosFives will not return True (which is the only way your code produces any output at all) for a very long time. Think about how long it's going to take, starting from 10**20000 (shown below), to reach a value with no zeros in it by just adding 1 at each step.
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I need to add the integers from double digit number(triple etc.) together
Block quote 22 = 2+2 = 4
I considered doing it manually but because I have 999 number to get through that'll take a really long time.
I tried making two separate lists and adding it together but continually received syntax errors.
*edited for extra detail *
You can convert the integer to a string, and then sum the values up:
count = sum((int(digit) for digit in str(22)))
print(count)
This iterates over every digit, converts it back to an integer, and finally computes the sum over all digits.
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numbers = []
palindromes = []
for i in range (100,999):
for j in range(100,999):
number = i * j
test = str(number)
if test == test[::-1]:
palindromes.append(number)
print(palindromes[-1])
This code gives back palindromes. However it gives back 580085, which is far from 906609 which is correct. Is there something in the code that makes it quit early?
Your list does contain all the palindromes in that range, but not necessarily in a sorted order; the biggest one is somewhere in the middle. Use max to retrieve it.
print(max(palindromes))