How can I print variable and string on same line in Python?

Question

I am using python to work out how many children would be born in 5 years if a child was born every 7 seconds. The problem is on my last line. How do I get a variable to work when I'm printing text either side of it?

Here is my code:

currentPop = 312032486
oneYear = 365
hours = 24
minutes = 60
seconds = 60

# seconds in a single day
secondsInDay = hours * minutes * seconds

# seconds in a year
secondsInYear = secondsInDay * oneYear

fiveYears = secondsInYear * 5

#Seconds in 5 years
print fiveYears

# fiveYears in seconds, divided by 7 seconds
births = fiveYears // 7

print "If there was a birth every 7 seconds, there would be: " births "births"

Be careful in 2020 (common sense, I know :D ). Print has become a function in Python3, needs to be used with brackets now: `print(something)` (Also Python2 is outdated since this year.) — PythoNic, Jul 17 '20 at 17:21
The other version of the question seems to have been less viewed, despite getting more votes and having better quality (more comprehensive and higher voted) answers. My best guess is that this is because the other version had a poor title. I attempted to improve the title and then closed this as a duplicate; the other one looks like the best canonical to me. — Karl Knechtel, Jan 02 '23 at 00:58

score 362 · Accepted Answer · edited Oct 19 '20 at 10:00

Use , to separate strings and variables while printing:

print("If there was a birth every 7 seconds, there would be: ", births, "births")

, in print function separates the items by a single space:

>>> print("foo", "bar", "spam")
foo bar spam

or better use string formatting:

print("If there was a birth every 7 seconds, there would be: {} births".format(births))

String formatting is much more powerful and allows you to do some other things as well, like padding, fill, alignment, width, set precision, etc.

>>> print("{:d} {:03d} {:>20f}".format(1, 2, 1.1))
1 002             1.100000
  ^^^
  0's padded to 2

Demo:

>>> births = 4
>>> print("If there was a birth every 7 seconds, there would be: ", births, "births")
If there was a birth every 7 seconds, there would be:  4 births

# formatting
>>> print("If there was a birth every 7 seconds, there would be: {} births".format(births))
If there was a birth every 7 seconds, there would be: 4 births

score 148 · Answer 2 · edited Oct 19 '20 at 10:02

148

Python is a very versatile language. You may print variables by different methods. I have listed below five methods. You may use them according to your convenience.

Example:

a = 1
b = 'ball'

Method 1:

print('I have %d %s' % (a, b))

Method 2:

print('I have', a, b)

Method 3:

print('I have {} {}'.format(a, b))

Method 4:

print('I have ' + str(a) + ' ' + b)

Method 5:

print(f'I have {a} {b}')

The output would be:

I have 1 ball

edited Oct 19 '20 at 10:02

Georgy

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answered Jul 05 '18 at 09:20

Gagan Agrawal

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Decision is related to your programming style: M2 is procedural programming, M3 is object-oriented programming. Keyword for M5 is [formatted string literal](https://docs.python.org/3/reference/lexical_analysis.html#f-strings). String operations like M1 and M4 should be used if needed, which is not the case here (M1 for dictionaries and tuples; M4 e.g. for ascii-art and other formatted output) – PythoNic Jul 17 '20 at 17:12

TehTris · Answer 3 · 2022-08-05T04:08:31.683

Two more

The First one

>>> births = str(5)
>>> print("there are " + births + " births.")
there are 5 births.

When adding strings, they concatenate.

The Second One

Also the format (Python 2.6 and newer) method of strings is probably the standard way:

>>> births = str(5)
>>>
>>> print("there are {} births.".format(births))
there are 5 births.

This format method can be used with lists as well

>>> format_list = ['five', 'three']
>>> # * unpacks the list:
>>> print("there are {} births and {} deaths".format(*format_list))  
there are five births and three deaths

or dictionaries

>>> format_dictionary = {'births': 'five', 'deaths': 'three'}
>>> # ** unpacks the dictionary
>>> print("there are {births} births, and {deaths} deaths".format(**format_dictionary))
there are five births, and three deaths

Edit:

Its 2022 and python3 has f strings now.

>>> x = 15
>>> f"there are {x} births"
'there are 15 births'

score 29 · Answer 4 · edited Aug 14 '16 at 21:25

29

If you want to work with python 3, it's very simple:

print("If there was a birth every 7 second, there would be %d births." % (births))

edited Aug 14 '16 at 21:25

Christian Ternus

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answered Aug 14 '16 at 10:53

Python Coding Trainer

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score 19 · Answer 5 · edited Jul 10 '20 at 06:09

19

You can either use the f-string or .format() methods

Using f-string

print(f'If there was a birth every 7 seconds, there would be: {births} births')

Using .format()

print("If there was a birth every 7 seconds, there would be: {births} births".format(births=births))

edited Jul 10 '20 at 06:09

Sulfkain

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answered Feb 12 '19 at 08:07

ms8277

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score 18 · Answer 6 · answered Jul 18 '18 at 16:19

18

As of python 3.6 you can use Literal String Interpolation.

births = 5.25487
>>> print(f'If there was a birth every 7 seconds, there would be: {births:.2f} births')
If there was a birth every 7 seconds, there would be: 5.25 births

answered Jul 18 '18 at 16:19

PabTorre

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score 12 · Answer 7 · answered Jun 17 '13 at 17:59

12

You can either use a formatstring:

print "There are %d births" % (births,)

or in this simple case:

print "There are ", births, "births"

answered Jun 17 '13 at 17:59

enpenax

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be careful if using that second way though, because that is a tuple, not a string. – TehTris Apr 11 '14 at 23:20

score 9 · Answer 8 · answered Apr 24 '19 at 10:49

9

If you are using python 3.6 or latest, f-string is the best and easy one

print(f"{your_varaible_name}")

answered Apr 24 '19 at 10:49

Mathanraj-Sharma

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score 4 · Answer 9 · answered Aug 13 '22 at 09:51

Starting from Python-3.8, you can use f-strings with variable name printing!

age = 19
vitality = 17
charisma = 16
name = "Alice"
print(f"{name=}, {age=}, {vitality=}, {charisma=}")
# name='Alice', age=19, vitality=17, charisma=16

Naming mistakes are almost impossible here! If you add, rename or remove a variable, your debug print will stay correct
The debug line is very concise
Don't worry about alignment. Is the 4-th argument charisma or vitality? Well, you don't care, it's correct regardless.

This is useful to know about, but I don't think it quite connects with the question that was asked. — Karl Knechtel, Aug 13 '22 at 10:02

score 3 · Answer 10 · edited May 29 '18 at 01:53

3

On a current python version you have to use parenthesis, like so :

print ("If there was a birth every 7 seconds", X)

edited May 29 '18 at 01:53

Sufiyan Ghori

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answered Jul 12 '16 at 05:49

Dror

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score 3 · Answer 11 · answered Jan 30 '17 at 17:17

3

You would first make a variable: for example: D = 1. Then Do This but replace the string with whatever you want:

D = 1
print("Here is a number!:",D)

answered Jan 30 '17 at 17:17

Pythonbites Programming

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score 2 · Answer 12 · answered Jun 17 '13 at 17:59

2

You can use string formatting to do this:

print "If there was a birth every 7 seconds, there would be: %d births" % births

or you can give print multiple arguments, and it will automatically separate them by a space:

print "If there was a birth every 7 seconds, there would be:", births, "births"

answered Jun 17 '13 at 17:59

Amber

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thank you for the answer Amber. Can you explain what the 'd' does after the % symbol? thanks – Bob Uni Jun 17 '13 at 18:03
2

`%d` means "format value as an integer". Similarly, `%s` would be "format value as a string", and `%f` is "format value as a floating point number". These and more are documented in the portion of the Python manual I linked to in my answer. – Amber Jun 17 '13 at 18:04

Siddharth Dash · Answer 13 · 2018-07-18T05:46:14.723

2

use String formatting

print("If there was a birth every 7 seconds, there would be: {} births".format(births))
 # Will replace "{}" with births

if you doing a toy project use:

print('If there was a birth every 7 seconds, there would be:' births'births)

or

print('If there was a birth every 7 seconds, there would be: %d births' %(births))
# Will replace %d with births

edited Jul 18 '18 at 05:46

answered Jul 18 '18 at 05:40

Siddharth Dash

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score 1 · Answer 14 · edited Sep 17 '19 at 11:39

1

Just use , (comma) in between.

See this code for better understanding:

# Weight converter pounds to kg

weight_lbs = input("Enter your weight in pounds: ")

weight_kg = 0.45 * int(weight_lbs)

print("You are ", weight_kg, " kg")

edited Sep 17 '19 at 11:39

Manrique

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answered Jul 21 '19 at 14:32

Faisal Ahmed

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score 0 · Answer 15 · answered Jun 17 '16 at 18:21

I copied and pasted your script into a .py file. I ran it as-is with Python 2.7.10 and received the same syntax error. I also tried the script in Python 3.5 and received the following output:

File "print_strings_on_same_line.py", line 16
print fiveYears
              ^
SyntaxError: Missing parentheses in call to 'print'

Then, I modified the last line where it prints the number of births as follows:

currentPop = 312032486
oneYear = 365
hours = 24
minutes = 60
seconds = 60

# seconds in a single day
secondsInDay = hours * minutes * seconds

# seconds in a year
secondsInYear = secondsInDay * oneYear

fiveYears = secondsInYear * 5

#Seconds in 5 years
print fiveYears

# fiveYears in seconds, divided by 7 seconds
births = fiveYears // 7

print "If there was a birth every 7 seconds, there would be: " + str(births) + " births"

The output was (Python 2.7.10):

157680000
If there was a birth every 7 seconds, there would be: 22525714 births

I hope this helps.

score -1 · Answer 16 · answered Jan 25 '19 at 12:18

-1

Slightly different: Using Python 3 and print several variables in the same line:

print("~~Create new DB:",argv[5],"; with user:",argv[3],"; and Password:",argv[4]," ~~")

answered Jan 25 '19 at 12:18

Qohelet

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score -1 · Answer 17 · answered Jul 16 '19 at 07:42

-1

PYTHON 3

Better to use the format option

user_name=input("Enter your name : )

points = 10

print ("Hello, {} your point is {} : ".format(user_name,points)

or declare the input as string and use

user_name=str(input("Enter your name : ))

points = 10

print("Hello, "+user_name+" your point is " +str(points))

answered Jul 16 '19 at 07:42

Bromount

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String `"Enter your name :` misses closing quotation mark – barbsan Jul 16 '19 at 08:05
`print ("Hello, {} your point is {} : ".format(user_name,points)` missing closing bracket. – Hillsie Nov 22 '19 at 21:26

score -1 · Answer 18 · answered Feb 19 '20 at 23:08

-1

If you use a comma inbetween the strings and the variable, like this:

print "If there was a birth every 7 seconds, there would be: ", births, "births"

answered Feb 19 '20 at 23:08

How can I print variable and string on same line in Python?

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