## Objective

Extract out the abscissa and ordinate from an input co-ordinate point.

## Difficulty

## Description

A co-ordinate is a point on a Cartesian plane, having a value for the x-axis and a value for the y-axis.

It's usually denoted as follows:

(x,y)

The first number inside the parentheses is the value for x-axis, formally known as the ** abscissa**. The second number is the value for the y-axis, formally known as the

**.**

*ordinate*In this exercise, given a co-ordinate, we ought to extract out the abscissa and ordinate from it and print them, each on a new line.

Ask the user to input a co-ordinate with the following prompt message:

The input value should be of the following form: `(`

, where *x*,*y*)* x* is the abscissa and

*is the ordinate.*

`y`

*,*

`x`

`,`

and *.*

`y`

Once the co-ordinate is given, extract out the abscissa and ordinate from it and output them, each on a new line, after leaving a blank line to start with.

A couple of examples follow:

## Hints

#### Hint 1

Find the index of the comma (`,`

) in the input value using the `find()`

string method.

#### Hint 2

Slice the input value in two portions.

## New file

Inside the directory you created for this course on Python, create a new folder called **Exercise-11-Abscissa-and-Ordinate** and put the .py solution files for this exercise within it.

## Solution

To solve this exercise, we just need to know two things: string slicing and `find()`

.

If you know both of these, you're good to go!

Step one is to set up the input prompt and receive the co-ordinate from the user, as stated. We'll call this `point`

.

Let's get done with this first:

`point = input('Enter the co-ordinate: ')`

Step two is to find the index of the comma (`,`

) in `point`

.

This is required so that we could slice `point`

in two halves at this position and then extract out the abscissa and ordinate from each half.

```
point = input('Enter the co-ordinate: ')
index = point.find(',')
```

Once the index of the comma is found, the next step is compute the abscissa.

The abscissa starts right after the first parenthesis (`(`

) in the string `point`

and ends just before the comma (`,`

). So to extract it, we write the following code:

```
point = input('Enter the co-ordinate: ')
index = point.find(',')
abscissa = point[1:index]
```

Next up, we move to extract the ordinate.

The ordinate begins right after the comma (`,`

) and ends just before the ending parenthesis (`)`

). This gives us the following code:

```
point = input('Enter the co-ordinate: ')
index = point.find(',')
abscissa = point[1:index]
ordinate = point[index + 1:-1]
```

With the abscissa and ordinate in hand, we make the desired output keeping in mind that we have to leave a blank line before doing so.

Altogether, we get the following code:

```
point = input('Enter the co-ordinate: ')
index = point.find(',')
abscissa = point[1:index]
ordinate = point[index + 1:-1]
print()
print('Abscissa:', abscissa);
print('Ordinate:', ordinate);
```