Understanding the String Formatting Operator % in Python
In Python, the % operator serves a crucial role in string formatting. It allows you to create formatted strings by substituting variables or values into placeholders within a string template.
When used with a string on the left-hand side, the % operator operates as a string formatter. It expects a string containing placeholders followed by values to be substituted. The syntax for string formatting is as follows:
format % values
Here, format is the template string containing placeholders (%s, %d, etc.), and values are the values to be substituted into the placeholders.
For instance, consider the following code:
<code class="python">name = "John" age = 30 message = "Hello %s! You are %d years old." % (name, age) print(message)</code>
In this example, message is the template string with two placeholders, %s (for string) and %d (for integer). The placeholder %s is substituted with the value of name, while %d is substituted with the value of age. The resulting formatted string is then stored in message and printed.
Therefore, the % operator enables dynamic string manipulation, making it a versatile tool for generating formatted strings with embedded variables or values.
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