What does underscore in a number mean? [duplicate]

13

This question already has an answer here:

• 
  How to use digit separators for Python integer literals?
  
  4 answers
  
  


• 
  What do 1_000 and 100_000 mean? [duplicate]
  
  2 answers
  
  


• 
  Declaring a number in Python. Possible to emphasize thousand?
  
  2 answers
  
  

I am wondering why the following variable is treated like a number?

a = 1_000_000

print (a)

1000000

Shouldn't print(a) return 1_000_000?

python python-3.x

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asked Jan 2 at 16:24

sophrossophros

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Jan 2 at 16:43

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13

This question already has an answer here:

• 
  How to use digit separators for Python integer literals?
  
  4 answers
  
  


• 
  What do 1_000 and 100_000 mean? [duplicate]
  
  2 answers
  
  


• 
  Declaring a number in Python. Possible to emphasize thousand?
  
  2 answers
  
  

I am wondering why the following variable is treated like a number?

a = 1_000_000

print (a)

1000000

Shouldn't print(a) return 1_000_000?

python python-3.x

share|improve this question

asked Jan 2 at 16:24

sophrossophros

2,2381625

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Jan 2 at 16:43

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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13

13

13

This question already has an answer here:

• 
  How to use digit separators for Python integer literals?
  
  4 answers
  
  


• 
  What do 1_000 and 100_000 mean? [duplicate]
  
  2 answers
  
  


• 
  Declaring a number in Python. Possible to emphasize thousand?
  
  2 answers
  
  

I am wondering why the following variable is treated like a number?

a = 1_000_000

print (a)

1000000

Shouldn't print(a) return 1_000_000?

python python-3.x

share|improve this question

asked Jan 2 at 16:24

sophrossophros

2,2381625

This question already has an answer here:

• 
  How to use digit separators for Python integer literals?
  
  4 answers
  
  


• 
  What do 1_000 and 100_000 mean? [duplicate]
  
  2 answers
  
  


• 
  Declaring a number in Python. Possible to emphasize thousand?
  
  2 answers
  
  

I am wondering why the following variable is treated like a number?

a = 1_000_000

print (a)

1000000

Shouldn't print(a) return 1_000_000?

This question already has an answer here:

• 
  How to use digit separators for Python integer literals?
  
  4 answers
  
  


• 
  What do 1_000 and 100_000 mean? [duplicate]
  
  2 answers
  
  


• 
  Declaring a number in Python. Possible to emphasize thousand?
  
  2 answers
  
  

python python-3.x

python python-3.x

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asked Jan 2 at 16:24

sophrossophros

2,2381625

share|improve this question

asked Jan 2 at 16:24

sophrossophros

2,2381625

share|improve this question

share|improve this question

asked Jan 2 at 16:24

sophrossophros

2,2381625

asked Jan 2 at 16:24

sophrossophros

2,2381625

asked Jan 2 at 16:24

sophrossophros

2,2381625

2,2381625

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Jan 2 at 16:43

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Jan 2 at 16:43

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

add a comment | 

add a comment | 

3 Answers
3

active

oldest

votes

21

With Python 3.6 (and PEP-515) there is a new convenience notation for big numbers introduced which allows you to divide groups of digits in the number literal so that it is easier to read them.

Examples of use:

a = 1_00_00  # you do not need to group digits by 3!

b = 0xbad_c0ffee  # you can make fun with hex digit notation

c = 0b0101_01010101010_0100  # works with binary notation

f = 1_000_00.0

print(a,b,c,f)

10000

50159747054

174756

100000.0

print(int('1_000_000'))

print(int('0xbad_c0ffee', 16))

print(int('0b0101_01010101010_0100',2))

print(float('1_000_00.0'))

1000000

50159747054

174756

100000.0

A = 1__000  # SyntaxError: invalid token

share|improve this answer

edited Jan 2 at 16:31

answered Jan 2 at 16:24

sophrossophros

2,2381625

add a comment | 

2

Python allows you to put underscores in numbers for convenience. They're used to separate groups of numbers, much like commas do in non-programming. Underscores are completely ignored in numbers, much like comments. So this:

x = 1_000_000

is interpreted to be the same as this:

x = 1000000

However, you can't put two underscores right next to each other like this:

x = 1__000__000 #SyntaxError

share|improve this answer

answered Jan 2 at 16:28

pizza static void mainpizza static void main

1,6361924

add a comment | 

2

In English speaking countries, commas are generally used as thousand separators, while in many other countries, periods are used as thousand separators. Given the differing conventions, and the fact that both commas and periods are used for other things in Python, it was decided to use underscores as separators.

share|improve this answer

answered Jan 2 at 16:36

AcccumulationAcccumulation

1,38529

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  In India, which is English speaking, the separator is not placed at thousands: en.wikipedia.org/wiki/Crore
  
  – Neil G
  Jan 9 at 22:37
  

  
  
  
  

add a comment | 

3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

active

oldest

votes

active

oldest

votes

21

With Python 3.6 (and PEP-515) there is a new convenience notation for big numbers introduced which allows you to divide groups of digits in the number literal so that it is easier to read them.

Examples of use:

a = 1_00_00  # you do not need to group digits by 3!

b = 0xbad_c0ffee  # you can make fun with hex digit notation

c = 0b0101_01010101010_0100  # works with binary notation

f = 1_000_00.0

print(a,b,c,f)

10000

50159747054

174756

100000.0

print(int('1_000_000'))

print(int('0xbad_c0ffee', 16))

print(int('0b0101_01010101010_0100',2))

print(float('1_000_00.0'))

1000000

50159747054

174756

100000.0

A = 1__000  # SyntaxError: invalid token

share|improve this answer

edited Jan 2 at 16:31

answered Jan 2 at 16:24

sophrossophros

2,2381625

add a comment | 

21

With Python 3.6 (and PEP-515) there is a new convenience notation for big numbers introduced which allows you to divide groups of digits in the number literal so that it is easier to read them.

Examples of use:

a = 1_00_00  # you do not need to group digits by 3!

b = 0xbad_c0ffee  # you can make fun with hex digit notation

c = 0b0101_01010101010_0100  # works with binary notation

f = 1_000_00.0

print(a,b,c,f)

10000

50159747054

174756

100000.0

print(int('1_000_000'))

print(int('0xbad_c0ffee', 16))

print(int('0b0101_01010101010_0100',2))

print(float('1_000_00.0'))

1000000

50159747054

174756

100000.0

A = 1__000  # SyntaxError: invalid token

share|improve this answer

edited Jan 2 at 16:31

answered Jan 2 at 16:24

sophrossophros

2,2381625

add a comment | 

21

21

21

With Python 3.6 (and PEP-515) there is a new convenience notation for big numbers introduced which allows you to divide groups of digits in the number literal so that it is easier to read them.

Examples of use:

a = 1_00_00  # you do not need to group digits by 3!

b = 0xbad_c0ffee  # you can make fun with hex digit notation

c = 0b0101_01010101010_0100  # works with binary notation

f = 1_000_00.0

print(a,b,c,f)

10000

50159747054

174756

100000.0

print(int('1_000_000'))

print(int('0xbad_c0ffee', 16))

print(int('0b0101_01010101010_0100',2))

print(float('1_000_00.0'))

1000000

50159747054

174756

100000.0

A = 1__000  # SyntaxError: invalid token

share|improve this answer

edited Jan 2 at 16:31

answered Jan 2 at 16:24

sophrossophros

2,2381625

With Python 3.6 (and PEP-515) there is a new convenience notation for big numbers introduced which allows you to divide groups of digits in the number literal so that it is easier to read them.

Examples of use:

a = 1_00_00  # you do not need to group digits by 3!

b = 0xbad_c0ffee  # you can make fun with hex digit notation

c = 0b0101_01010101010_0100  # works with binary notation

f = 1_000_00.0

print(a,b,c,f)

10000

50159747054

174756

100000.0

print(int('1_000_000'))

print(int('0xbad_c0ffee', 16))

print(int('0b0101_01010101010_0100',2))

print(float('1_000_00.0'))

1000000

50159747054

174756

100000.0

A = 1__000  # SyntaxError: invalid token

share|improve this answer

edited Jan 2 at 16:31

answered Jan 2 at 16:24

sophrossophros

2,2381625

share|improve this answer

share|improve this answer

edited Jan 2 at 16:31

edited Jan 2 at 16:31

edited Jan 2 at 16:31

answered Jan 2 at 16:24

sophrossophros

2,2381625

answered Jan 2 at 16:24

sophrossophros

2,2381625

answered Jan 2 at 16:24

sophrossophros

2,2381625

2,2381625

add a comment | 

add a comment | 

2

Python allows you to put underscores in numbers for convenience. They're used to separate groups of numbers, much like commas do in non-programming. Underscores are completely ignored in numbers, much like comments. So this:

x = 1_000_000

is interpreted to be the same as this:

x = 1000000

However, you can't put two underscores right next to each other like this:

x = 1__000__000 #SyntaxError

share|improve this answer

answered Jan 2 at 16:28

pizza static void mainpizza static void main

1,6361924

add a comment | 

2

Python allows you to put underscores in numbers for convenience. They're used to separate groups of numbers, much like commas do in non-programming. Underscores are completely ignored in numbers, much like comments. So this:

x = 1_000_000

is interpreted to be the same as this:

x = 1000000

However, you can't put two underscores right next to each other like this:

x = 1__000__000 #SyntaxError

share|improve this answer

answered Jan 2 at 16:28

pizza static void mainpizza static void main

1,6361924

add a comment | 

2

2

2

Python allows you to put underscores in numbers for convenience. They're used to separate groups of numbers, much like commas do in non-programming. Underscores are completely ignored in numbers, much like comments. So this:

x = 1_000_000

is interpreted to be the same as this:

x = 1000000

However, you can't put two underscores right next to each other like this:

x = 1__000__000 #SyntaxError

share|improve this answer

answered Jan 2 at 16:28

pizza static void mainpizza static void main

1,6361924

Python allows you to put underscores in numbers for convenience. They're used to separate groups of numbers, much like commas do in non-programming. Underscores are completely ignored in numbers, much like comments. So this:

x = 1_000_000

is interpreted to be the same as this:

x = 1000000

However, you can't put two underscores right next to each other like this:

x = 1__000__000 #SyntaxError

share|improve this answer

answered Jan 2 at 16:28

pizza static void mainpizza static void main

1,6361924

share|improve this answer

share|improve this answer

answered Jan 2 at 16:28

pizza static void mainpizza static void main

1,6361924

answered Jan 2 at 16:28

pizza static void mainpizza static void main

1,6361924

answered Jan 2 at 16:28

pizza static void mainpizza static void main

1,6361924

1,6361924

add a comment | 

add a comment | 

2

In English speaking countries, commas are generally used as thousand separators, while in many other countries, periods are used as thousand separators. Given the differing conventions, and the fact that both commas and periods are used for other things in Python, it was decided to use underscores as separators.

share|improve this answer

answered Jan 2 at 16:36

AcccumulationAcccumulation

1,38529

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  In India, which is English speaking, the separator is not placed at thousands: en.wikipedia.org/wiki/Crore
  
  – Neil G
  Jan 9 at 22:37
  

  
  
  
  

add a comment | 

2

In English speaking countries, commas are generally used as thousand separators, while in many other countries, periods are used as thousand separators. Given the differing conventions, and the fact that both commas and periods are used for other things in Python, it was decided to use underscores as separators.

share|improve this answer

answered Jan 2 at 16:36

AcccumulationAcccumulation

1,38529

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  In India, which is English speaking, the separator is not placed at thousands: en.wikipedia.org/wiki/Crore
  
  – Neil G
  Jan 9 at 22:37
  

  
  
  
  

add a comment | 

2

2

2

In English speaking countries, commas are generally used as thousand separators, while in many other countries, periods are used as thousand separators. Given the differing conventions, and the fact that both commas and periods are used for other things in Python, it was decided to use underscores as separators.

share|improve this answer

answered Jan 2 at 16:36

AcccumulationAcccumulation

1,38529

In English speaking countries, commas are generally used as thousand separators, while in many other countries, periods are used as thousand separators. Given the differing conventions, and the fact that both commas and periods are used for other things in Python, it was decided to use underscores as separators.

share|improve this answer

answered Jan 2 at 16:36

AcccumulationAcccumulation

1,38529

share|improve this answer

share|improve this answer

answered Jan 2 at 16:36

AcccumulationAcccumulation

1,38529

answered Jan 2 at 16:36

AcccumulationAcccumulation

1,38529

answered Jan 2 at 16:36

AcccumulationAcccumulation

1,38529

1,38529

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  In India, which is English speaking, the separator is not placed at thousands: en.wikipedia.org/wiki/Crore
  
  – Neil G
  Jan 9 at 22:37
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  In India, which is English speaking, the separator is not placed at thousands: en.wikipedia.org/wiki/Crore
  
  – Neil G
  Jan 9 at 22:37
  

  
  
  
  

In India, which is English speaking, the separator is not placed at thousands: en.wikipedia.org/wiki/Crore

– Neil G
Jan 9 at 22:37

In India, which is English speaking, the separator is not placed at thousands: en.wikipedia.org/wiki/Crore

– Neil G
Jan 9 at 22:37

add a comment | 

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