[Tut] How to Print a String and an Integer

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How to Print a String and an Integer

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Problem Formulation and Solution Overview

In this article, you’ll learn how to print a string and an integer together in Python.

To make it more fun, we have the following running scenario:

The Finxter Academy has decided to send its users an encouraging message using their First Name (a String) and Problems Solved (an Integer). They have provided you with five (5) fictitious users to work with and to select the most appropriate option.

First_Name |
Puzzles Solved

Steve |
39915

Amy |
31001

Peter |
29675

Marcus |
24150

Alice |
23580

Question: How would we write code to print a String and an Integer?

We can accomplish this task by one of the following options:

• Method 1: Use a
  Code:

  print()
  function
  
  
• Method 2: Use the
  Code:

  print()
  function and
  Code:

  str()
  method
  
  
• Method 3: Use
  Code:

  f-string
  with the
  Code:

  print()
  function
  
  
• Method 4: Use the
  Code:

  %d
  ,
  Code:

  %s
  and
  Code:

  %f
  operators
  
  
• Method 5: Use identification numbers
  
  
• Method 6: Use
  Code:

  f-string
  conditionals
  
  
• Bonus: Format CSV for output
  

Method 1: Use the print() function

This example uses the

Code:

print()

function to output a String and an Integer.

Code:

print('Steve', 39915)

This function offers the ability to accept various Data Types and output the results, separated by commas (

Code:

,

) to the terminal.

Although not the most aesthetically pleasing output, it gets the job done. The

Code:

print()

function at its most simplistic level!

Steve 39915



Method 2: Use the print() function and str() method

This example uses the

Code:

print()

function and the

Code:

str()

method to format and output a sentence containing a String and an Integer.

Code:

print('Steve has solved ' + str(39915) + ' puzzles!')

To successfully output the contents of the

Code:

print()

function, the Integer must first be converted to a String. This can be done by calling the

Code:

str()

method and passing, in this case,

Code:

39915

as an argument.

Steve has solved 39915 puzzles!



Method 3: Use f-string with print() function

This example uses the

Code:

f-string

inside the

Code:

print()

function. This method uses curly brackets (

Code:

{}

) to accept and display the data.

Code:

first_name = 'Steve' solved = 39915 print(f'{first_name} has solved {solved} puzzles to date!')

Above, two (2) variables are declared:

Code:

first_name

and

Code:

solved

.

The

Code:

print()

function is called and passed these two (2) variables, each inside curly braces (

Code:

{})

. This indicates that Python should expect two (2) variables of unknown Data Types. The

Code:

print()

function executes and sends this output to the terminal.

Steve has solved 39915 puzzles!



What if you need to print out all Finxter users? This example assumes the data is saved to separate

Code:

Lists

and output using a

Code:

For

loop.

Code:

f_name = ['Steve', 'Amy', 'Peter', 'Marcus', 'Alice'] f_solved = [39915, 31001, 29675, 24150, 23580] for i in range(len(f_name)): print(f'{f_name[i]} has solved {f_solved[i]} puzzles to date!')

Steve has solved 39915 puzzles to date!
Amy has solved 31001 puzzles to date!
Peter has solved 29675 puzzles to date!
Marcus has solved 24150 puzzles to date!
Alice has solved 23580 puzzles to date!



Method 4: Use %d, %s and %f Operator

This examples uses the

Code:

%d

(decimal value), the

Code:

%s

(string value), and

Code:

%f

(float value) inside the

Code:

print()

function to output the fictitious Finxter user’s data.

Code:

f_name = ['Steve', 'Amy', 'Peter', 'Marcus', 'Alice'] f_solved = [39915, 31001, 29675, 24150, 23580] f_avg = [99.315, 82.678, 79.563, 75.899, 71.233] i = 0 while i < len(f_name): print("%s solved %d puzzles with an average of %3.2f." % (f_name[i], f_solved[i], f_avg[i])) i += 1

Above, three (3) Lists are declared. Each List carries different information for each user (

Code:

f_name

,

Code:

f_solved

,

Code:

f_avg

).

The following line instantiates a

Code:

while

loop and a counter (i) which increments upon each iteration. This loop iterates until the final element in

Code:

f_name

is reached.

Inside the loop, the

Code:

%s

(accepts strings) is replaced with the value of

Code:

f_name[i]

. Then,

Code:

%d

(accepts integers) is replaced with the value of

Code:

f_solved[i]

. Finally, the %3.2f (for floats) value of is replaced with

Code:

f_avg[i]

having two (2) decimal places. The output displays below.

Steve solved 39915 puzzles with an average of 99.31.
Amy solved 31001 puzzles with an average of 82.68.
Peter solved 29675 puzzles with an average of 79.56.
Marcus solved 24150 puzzles with an average of 75.90.
Alice solved 23580 puzzles with an average of 71.23.

Note: In the

Code:

%3.2f

annotation, the value of three (3) indicates the width, and 2 indicates the number of decimal places. Try different widths!



Method 5: Use identification numbers

This example uses field identification numbers, such as 0, 1, 2, etc., inside the

Code:

print()

function to identify the fields to display and in what order.

Code:

f_name = ['Steve', 'Amy', 'Peter', 'Marcus', 'Alice'] f_solved = [39915, 31001, 29675, 24150, 23580] for i in range(len(f_name)): print('{0} solved {1} puzzles!'.format(f_name[i], (format(f_solved[i], ',d'))))

Above, two (2)

Code:

Lists

are declared. Each

Code:

List

carries different information for each Finxter user (

Code:

f_name

,

Code:

f_solved

).

Then, using a

Code:

For

loop, the code runs through the above

Code:

Lists

. The numbers wrapped inside curly braces (

Code:

{0}, {1}

) indicate holding places for the expected data. This data appears inside the

Code:

format()

function (

Code:

(format(f_solved[i], ',d')))

) and are output to the terminal.

Steve solved 39,915 puzzles!
Amy solved 31,001 puzzles!
Peter solved 29,675 puzzles!
Marcus solved 24,150 puzzles!
Alice solved 23,580 puzzles!

Note: The data in

Code:

f_solved

is formatted to display a thousand comma (

Code:

',d'

).

Method 6: Use f-string and a conditional

This example uses an

Code:

f-string

and a conditional to display the results based on a condition inside the

Code:

print()

function.

Code:

f_name = ['Steve', 'Amy', 'Peter', 'Marcus', 'Alice'] f_solved = [39915, 31001, 29675, 24150, 23580] print(f'Has Alice solved more puzzles than Amy? {True if f_solved[4] > f_solved[1] else False}')

Above, two (2) Lists are declared. Each

Code:

List

carries different information for each Finxter user (

Code:

f_name

,

Code:

f_solved

).

Inside the

Code:

print()

function, the code inside the curly braces (

Code:

{}

) checks to see if the number of puzzles Alice has solved is greater than the number of puzzles Amy has solved. True or False returns based on the outcome and is output along with the String to the terminal.

Has Alice solved more puzzles than Amy? False

Bonus: Putting it Together!

This article used several ways to format a String and an Integer. However, let’s put this together to generate a custom email body!

The first step is to install the Pandas library. Click here for installation instructions.

Code:

import pandas as pd finxters = pd.read_csv('finxter_top5.csv') for _, row in finxters.iterrows(): user_email = row[3] e_body = f""" Hello {row[0]} {row[1]},\n The Finxter Academy wants to congratulate you on solving {row[2]:,d} puzzles. For achieving this, our Team is sending you a free copy of our latest book! Thank you for joining us. The Finxter Academy """ print(e_body.strip())

This code reads in a fictitious

Code:

finxter_top5.csv

file.

|
First_Name |
Last_Name |
Solved |
Email

0 |
Steve |
Hamilton |
39915 |
steveh@acme.org

1 |
Amy |
Pullister |
31001 |
amy.p@bminc.de

2 |
Peter |
Dunn |
29675 |
pdunn@tsce.ca

3 |
Marcus |
Williams |
24150 |
marwil@harpoprod.com

4 |
Alice |
Miller |
23580 |
amiller@harvest.com

Next, a For loop is instantiated to iterate through each row of the DataFrame

Code:

finxters

.

Note: The underscore (

Code:

_

) character in the

Code:

for

loop indicates that the value is unimportant and not used, but needed.

For each loop, the user’s email address is retrieved from the row position (

Code:

row[3])

. This email address saves to

Code:

user_email

.

Next, the custom email body is formatted using the

Code:

f-string

and passed the user’s First Name and Last Name in the salutation (

Code:

{row[0]} {row[1]}

). Then, the

Code:

solved

variable is formatted to display commas (

Code:

,

) indicating thousands (

Code:

{row[2]:,d}

). The results are saved to

Code:

e_body

and, for this example, are output to the terminal.

For this example, the first record displays.

Hello Steve Hamilton,
The Finxter Academy wants to congratulate you on solving 39,915 puzzles. For achieving this, our Team is sending you a free copy of our latest book. Thank you for joining us. The Finxter Academy

A Finxter Challenge!
Combine the knowledge you learned here to create a custom emailer.
Click here for a tutorial to get you started!

Summary

These six (6) methods of printing Strings and Integers should give you enough information to select the best one for your coding requirements.

Good Luck & Happy Coding!

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