I am currently trying out Python. I was trying to print out an upside-down pyramid. I'm making the pyramid out of *s and in each line, I have to delete a certain amount of *s from the line. This is my
space = ""
astr3 = "**********"
placeholder2 = 1
while placeholder2 < 10:
print (space, astr3, "\n")
space += " "
astr3 = "*********" #this is supposed to be subtraction
placeholder2 += 1
Please tell if there is any way to delete strings from strings.
You can use list slicing to slice Strings/Lists. Check it out. You don't need \n in the print statement as it adds a newline. To make a pyramid using your logic, you can delete two * from the string and then print. Remember, it's always better to use intuitive names for the variables. Eg: you can use, idx for index instead of placeholder2.
# Program to print an upside down pyramid
space = ""
astr3 = "**********"
num_stars = len(astr3) # len(astr3) gives number of * in the astr3 string
placeholder2 = 1
while placeholder2 < num_stars // 2:
display_str = space + astr3 # Adding strings is called concatnation.
print(display_str) # This will not add additional space between spaces and astr3
space += " "
astr3 = astr3[:-1] # deleting the last element from the list. Called list slicing
astr3 = astr3[1:] # deleting the first element from the list. Called list slicing
placeholder2 += 1
The above code outputs the following:
**********
********
******
****
**
TIP: It's better to share the expected output in the question so that the community can help.
Initialize placeholder2 with 0 to get the pyramid from the original string to 1 length string. Since your requirements were to remove the string 1 by per line. To do it set the condition astr3[:-1] and put it to the same variable.
space = ""
astr3 = "**********"
placeholder2 = 0
while placeholder2 < 10:
print(space, astr3)
space += " "
astr3 = astr3[:-1]
placeholder2 += 1
Output
**********
*********
********
*******
******
*****
****
***
**
*
Thank you guys for all the help! I took what you guys said and made the pyramid :D (although my code is very very dumbed down). Here is the code:
space1 = ""
astr4 = "**********"
placeholder3 = 1
while placeholder3 < 7:
if placeholder3 == 6:
print (space1, "*")
print(space1, astr4)
astr4 = astr4[1:]
astr4 = astr4[:-1]
space1 += " "
placeholder3 += 1
astr3 = astr3[1:]*value will reduce by 1 per line and space value will increase by 1 per line?