What are placeholder variables?

Question

Explain what you mean by placeholder variable. An example will be appreciated.

Answer 1

They are used for formatting strings. %s acts a placeholder for a string while %d acts as a placeholder for a number. Their associated values are passed in via a tuple using the % operator. name = 'marcog' number = 42 print '%s %d' % (name, number) will print marcog 42.

Answer 2

Placeholder variables are nontranslatable text strings that stand in for a term or phrase that is used multiple times, or represents a term that shouldn't be translated, such as an official product name. ... A placeholder variable is usually delimited by non-letter characters, such as \+ and \- .

Answer 3

Intuitively, a placeholder is a pre-formatted container into which content can be placed. By providing pre-set formatting to its content, it places many of the formatting choices in the hands of the template designer while allowing the end-user to concentrate on the actual content.

Answer 4

The placeholders can be identified using named indexes {price} , numbered indexes {0} , or even empty placeholders {} .

Answer 5

Insert the price inside the placeholder, the price should be in fixed point, two-decimal format:
EXAMPLE=

txt = "For only {price:.2f} dollars!"
print(txt.format(price = 49))