8000 New Excercises (#30) · samsonrobert/python-tutorial@18c7cea · GitHub
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New Excercises (Akuli#30)
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‎LICENSE‎

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The instructions and text in this tutorial (the "software") are licensed
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under the zlib License.
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(C) 2016-2018 Akuli
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(C) 2016-2021 Akuli
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages

‎basics/answers.md‎

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print("Access denied.")
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```
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Again, this is not a good way to ask a real password from the user.
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Again, this is not a good way to ask a real password from the user.
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## Handy stuff: Strings
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print(message, "!!!")
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print(message, "!!!")
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```
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3. In the code below, `palindrome_input[::-1]` is the string `palindrome_input` reversed.
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For example, if `palindrome_input` is `"hello"`, then `palindrome_input[::-1]` is `"olleh"`.
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```python
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palindrome_input=input("Type the number to check:")
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if palindrome_input == palindrome_input[::-1]:
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print("This string is a palindrome")
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else:
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print("This string is not a palindrome")
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```
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## Lists and tuples
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1. Look carefully. The `namelist` is written in `()` instead of `[]`,
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print(converted_numbers)
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```
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5. ``` python
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row_count = int(input("Type the number of rows needed:"))
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for column_count in range(1, row_count+1):
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# Print numbers from 1 to column_count
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for number in range(1, column_count+1):
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print(number, end=" ")
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print() # creates a new line for the next row
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```
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If the user enters 5, we want to do a row with 1 column, then 2 columns, and so on until 5 columns.
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That would be `for column_count in range(1, 6)`, because the end of the range is excluded.
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In general, we need to specify `row_count + 1` so that it actually ends at `row_count`.
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The second loop is similar.
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Usually `print(number)` puts a newline character at the end of the line, so that the next print goes to the next line.
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To get all numbers on the same line, we use a space instead of a newline character,
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but we still need `print()` to add a newline character once we have printed the entire row.
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6. ```python
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row_count=int(input("Type the number of rows needed:"))
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for line_number in range(1, row_count + 1):
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for number in range(line_number, row_count+1):
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print(number, end=' ')
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print()
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```
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Just like in the previous exercise, if the user enters 5, the first `for` loop gives the line numbers `1, 2, 3, 4, 5`.<br>
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For example, on line 2, we should print numbers from 2 to 5, as in `range(2, 6)`, or in general, `range(line_number, row_count+1)`.
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## Trey Hunner: zip and enumerate
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1. Read some lines with `input` into a list and then enumerate it.

‎basics/handy-stuff-strings.md‎

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print(message, "!!!")
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print(message, "!!!")
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```
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3. Make a program to take the input from the user and check if it is a palindrome.<br>
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(Hint: A string is a palindrome if it is the same when reversed. Google how to reverse a string.)
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The answers are [here](answers.md#handy-stuff-strings).
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‎basics/if.md‎

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the user entered the correct password, a wrong password, or nothing
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at all by pressing Enter without typing anything.
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The answers are [here](answers.md#if-else-and-elif).
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***

‎basics/loops.md‎

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number = int(number)
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print(numbers)
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```
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5. Make a program that prints a pyramid like shown below. Ask the user to type the number of rows needed.
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```
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OUTPUT for 5 rows
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1
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1 2
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1 2 3
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1 2 3 4
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1 2 3 4 5
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```
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6. Make a program to get a pyramid like shown below where user can type the number of rows needed.
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```
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OUTPUT for 5 rows
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1 2 3 4 5
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2 3 4 5
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3 4 5
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4 5
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5
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```
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The answers are [here](answers.md#loops).
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***

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