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Apprendre Advanced Formatting: Float, Round, and Percent | Strings Formatting
String Manipulation in Python

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Advanced Formatting: Float, Round, and Percent

Within a simple {} block, we can round a float number with the necessary precision, or represent a number as a percent.

Let's consider the pattern we will use in this chapter:

{:[thousands separator].[number][type]}

Please note, that like in the previous chapters, we don't need to place square brackets (I placed it for convenience).

  • [thousands separator] - the symbol used to separate every thousand (possible values are , and _ ).

  • [number] - is the precision, number of decimal places (used for rounding number).

  • [type] - type of number representing ( e - scientific notation, % - percentage (will multiply number by 100), g - general format, f - fixed-point notation). You can dive deeper into possible options in Python documentation.

123
print("Original number: {0}, formatted number: {0:.2f}".format(255/8)) print("Original number: {0}, formatted number: {0:.2%}".format(15/48)) print("Original number: {0}, formatted number: {0:,.2f}".format(35*6327))
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Tâche

Swipe to start coding

As of 2020, the population of the USA was 331002651. The total land area is 9147420 sq.km. Population density is the population-to-area ratio. Your tasks are:

  1. Format the first string so the population and area will be printed in format: 9,147,420, and insert variables in the correct order.
  2. Within the second .format function calculate the population density and format the number in format 28.45.

Solution

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Section 3. Chapitre 8

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book
Advanced Formatting: Float, Round, and Percent

Within a simple {} block, we can round a float number with the necessary precision, or represent a number as a percent.

Let's consider the pattern we will use in this chapter:

{:[thousands separator].[number][type]}

Please note, that like in the previous chapters, we don't need to place square brackets (I placed it for convenience).

  • [thousands separator] - the symbol used to separate every thousand (possible values are , and _ ).

  • [number] - is the precision, number of decimal places (used for rounding number).

  • [type] - type of number representing ( e - scientific notation, % - percentage (will multiply number by 100), g - general format, f - fixed-point notation). You can dive deeper into possible options in Python documentation.

123
print("Original number: {0}, formatted number: {0:.2f}".format(255/8)) print("Original number: {0}, formatted number: {0:.2%}".format(15/48)) print("Original number: {0}, formatted number: {0:,.2f}".format(35*6327))
copy
Tâche

Swipe to start coding

As of 2020, the population of the USA was 331002651. The total land area is 9147420 sq.km. Population density is the population-to-area ratio. Your tasks are:

  1. Format the first string so the population and area will be printed in format: 9,147,420, and insert variables in the correct order.
  2. Within the second .format function calculate the population density and format the number in format 28.45.

Solution

Switch to desktopPassez à un bureau pour une pratique réelleContinuez d'où vous êtes en utilisant l'une des options ci-dessous
Tout était clair ?

Comment pouvons-nous l'améliorer ?

Merci pour vos commentaires !

Section 3. Chapitre 8
Switch to desktopPassez à un bureau pour une pratique réelleContinuez d'où vous êtes en utilisant l'une des options ci-dessous
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