What does %s mean in a Python format string? - GeeksforGeeks (2024)

FAQs

What does %s mean in Python? ›

The % symbol is used in Python with a large variety of data types and configurations. %s specifically is used to perform concatenation of strings together. It allows us to format a value inside a string.

%s is used as a placeholder for string values you want to inject into a formatted string. %d is used as a placeholder for numeric or decimal values. For example (for python 3) print ('%s is %d years old' % ('Joe', 42))

One of the older ways to format strings in Python was to use the % operator. You can create strings and use %s inside that string which acts like a placeholder. Then you can write % followed be the actual string value you want to use. Here is a basic example using % string formatting.

Here's what python.org has to say about %i: Signed integer decimal. And %d: Signed integer decimal. %d stands for decimal and %i for integer. but both are same, you can use both.

The difference between %s and %r is that %s uses the str function and %r uses the repr function. You can read about the differences between str and repr in this answer, but for built-in types, the biggest difference in practice is that repr for strings includes quotes and all special characters are escaped.

It is a string formatting syntax (which it borrows from C). Please see "PyFormat": Python supports formatting values into strings. Although this can include very complicated expressions, the most basic usage is to insert values into a string with the %s placeholder.

%r is not a valid placeholder in the str. format() formatting operations; it only works in old-style % string formatting. It indeed converts the object to a representation through the repr() function.

%s is for string %d is for decimal (or int) %c is for character.

%d means number. %0nd means zero-padded number with a length. You build n by subtraction in your example. %s is a string. Your format string ends up being this: "%03d%s", 0, "Apple"

The %s operator lets you add a value into a Python string. The %s signifies that you want to add a string value into a string. The % operator can be used with other configurations, such as %d, to format different types of values.

What does %F mean in Python? ›

The %f formatter is used to input float values, or numbers with values after the decimal place. This formatter allows us to specify a number of decimal places to round the values by.

Multiple %s in a string:

We can use the %s operator to append the given string variable inside a string by putting it where we want to add the value. Python will simply add the string variables where we have used the %s operator in the string.

The %c is a format character gives the character representation.

In Python underscore (_) is often used to ignore a value. If one doesn't use some values when unpacking, just set the value to underscore (_).

The difference between %r and %s is, %r calls the repr() method and %s calls the str() method. Both of these are built-in Python functions. The repr() method returns a printable representation of the given object. The str() method returns the "informal" or nicely printable representation of a given object.

Python uses C-style string formatting to create new, formatted strings. The "%" operator is used to format a set of variables enclosed in a "tuple" (a fixed size list), together with a format string, which contains normal text together with "argument specifiers", special symbols like "%s" and "%d".

Generally speaking, the $ operator is used to extract or subset a specific part of a data object in R. For instance, this can be a data frame object or a list. In this example, I'll explain how to extract the values in a data frame columns using the $ operator.

the %s is a 'format character', indicating "insert a string here". The extra parameters after the string in your two function calls are the values to fill into the format character placeholders: In the first example, %s will be replaced with the contents of the command variable.

"%s" expects a pointer to a null-terminated string ( char* ). "%c" expects a character ( int ).

What does mean by %S in Java? ›

%s means interpret as string, %d is for digit, %x is digit in hexadecimal, %f is for float, etc....

s formats strings. d formats decimal integers. f formats floating-point numbers.

To use Java printf to format double and float values with decimal place precision, follow these two rules: Use %f as the double specifier in the text string. Precede the letter f with a decimal and number to specify precision.

That explains the 6.2 in the format specifier %6.2f. The f means the output is a floating-point number, that is, a number with a decimal point.

Python String replace() Method

The replace() method replaces a specified phrase with another specified phrase. Note: All occurrences of the specified phrase will be replaced, if nothing else is specified.

The second one "%8.2f" is a format description for a float number. Like other placeholders, it is introduced with the "%" character. This is followed by the total number of digits the string should contain. This number includes the decimal point and all the digits, i.e. before and after the decimal point.

We can control the width and precision of values too: in this example, '%6.2f' means "floating point number, six characters wide, two digits after the decimal point".

It means print as a floating point at least 3 wide and a precision of 2. This is a format specifier of a floating point number with 2 decimals and at least one digit left of the decimal point.

string[::2] reads “default start index, default stop index, step size is two—take every second element”.

The == operator compares the value or equality of two objects, whereas the Python is operator checks whether two variables point to the same object in memory. In the vast majority of cases, this means you should use the equality operators == and != , except when you're comparing to None .

Which is faster Java or Python? ›

Java and Python are two of the most popular programming languages. Of the two, Java is the faster language, but Python is simpler and easier to learn. Each is well-established, platform-independent, and part of a large, supportive community.

The syntax of a C program is harder than Python. Syntax of Python programs is easy to learn, write and read. In C, the Programmer has to do memory management on their own. Python uses an automatic garbage collector for memory management.

Ease of development – Python has fewer keywords and more free English language syntax whereas C is more difficult to write. Hence, if you want an easy development process go for Python. Performance – Python is slower than C as it takes significant CPU time for interpretation. So, speed-wise C is a better option.

[...] The underscore character ( _ ) is used to represent “the previous result” in Python's interactive shell and doctest tests. Installing a global _() function causes interference. Explicitly importing gettext() as _() avoids this problem. Even if it's a convention, it may not be the case in your code.

Single standalone underscore _ is a valid character for a Python identifier, so it can be used as a variable name. According to Python doc, the special identifier _ is used in the interactive interpreter to store the result of the last evaluation. It is stored in the builtin module. Here is an example.

We can use the %s operator to append the given string variable inside a string by putting it where we want to add the value. Python will simply add the string variables where we have used the %s operator in the string.

%s is for string %d is for decimal (or int) %c is for character.

Float is a function or reusable code in the Python programming language that converts values into floating point numbers. Floating point numbers are decimal values or fractional numbers like 133.5, 2897.11, and 3571.213, whereas real numbers like 56, 2, and 33 are called integers.

%s means its a string, %d is an integer, %f is floating point number. cheers!

Is %f used for float? ›

Float Format Specifier

Here, %f :- is format specifier for float types.

The |S1 and |S2 strings are data type descriptors; the first means the array holds strings of length 1, the second of length 2. The | pipe symbol is the byteorder flag; in this case there is no byte order flag needed, so it's set to | , meaning not applicable.

In Python, there is a module called Decimal, which is used to do some decimal floating point related tasks. This module provides correctly-rounded floating point arithmetic. To use it at first we need to import it the Decimal standard library module. import decimal.

The substring() method returns the part of the string from the start index up to and excluding the end index, or to the end of the string if no end index is supplied.

The Python replace() method is used to find and replace characters in a string. It requires a substring to be passed as an argument; the function finds and replaces it. The replace() method is commonly used in data cleaning.