Method 3 – Use of ABS Function to Change Positive Numbers to Negative Here, theExpensescolumn has a mix ofpositiveandnegativenumbers. We will change the positive numbers tonegativeand keep the negative numbers as it is. Steps: Select the cell where you want to change the positive number ton...
You can also use a negative step in the slicing syntax for Python: Python In [7]: arr_2[:2:-1] Out[7]: array([6, 5, 4]) In this code, you are not specifying the start index of the slice, you are specifying the stop value should be index 2, and the step should be -...
Python offers two main approaches for reversing a list. We will cover different methods more comprehensively below, but for now, I want to make this distinction clear. In-place reversal This method directly modifies the original list without creating a new one. Thereverse()method performs this ...
Python supports negative indexing, which provides a safer way to access elements from the end of a list without knowing its exact length. The index -1 always refers to the last element, -2 to the second-to-last element, and so on. Example: my_list = [10,20,30,40,50]# Access the ...
Similarly, when rounding up negative numbers, the math.ceil() function returns a negative integer greater than the original value. The following code prints -3. # Import the math module to access math.ceil() function import math number = -3.14 rounded_up = math.ceil(number) print(rounded_...
So, to access the first, second, and third elements of the example_array, you use the following index notation: example_array[0] 2 example_array[1] 4 example_array[2] 6 You can also use negative numbers as indices. When you use a negative number as an index, Python counts backwa...
Python Exercises Home ↩ Previous:Write a Python program to get a string which is n (non-negative integer) copies of a given string. Next:Write a Python program to count the number 4 in a given list. Python Code Editor: What is the difficulty level of this exercise?
Thesqrtfunction in Python'smathmodule raises an exception when it's given a negative number. Note that I said "raises" an exception. In Python we usually talk about "how to raise an exception" instead of "how to throw an exception". This is partly due to the fact thatraiseis a Python...
When a negative operand is introduced, things get more complicated.As it turns out, the way that computers determine the result of a modulo operation with a negative operand leaves ambiguity as to whether the remainder should take the sign of the dividend (the number being divided) or the ...
If the variablebalanceis set to a negative number, the output will be the string from theifstatement (Balance is below 0, add funds now or you will be charged a penalty). What if we want to have more than three possibilities, though? We can do this by writing more than oneelifstateme...