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Python supports string interpolation as of version 3.6, referred to as "formatted string literals". [ 12 ] [ 13 ] [ 14 ] Such a literal begins with an f or F before the opening quote, and uses braces for placeholders:
However, interpolation can be done in various ways: with "f-strings" (since Python 3.6 [12]), using the format method or the old % string-format operator. For instance, all of these Python statements:
One of the oldest examples is in shell scripts, where single quotes indicate a raw string or "literal string", while double quotes have escape sequences and variable interpolation. For example, in Python, raw strings are preceded by an r or R – compare 'C:\\Windows' with r'C:\Windows' (though, a Python raw string cannot end in an odd number ...
Polynomial interpolation can estimate local maxima and minima that are outside the range of the samples, unlike linear interpolation. For example, the interpolant above has a local maximum at x ≈ 1.566, f(x) ≈ 1.003 and a local minimum at x ≈ 4.708, f(x) ≈ −1.003.
String interpolation became available in Python 3.6 as "formatted string literals". [110] Triple-quoted (beginning and ending with three single or double quotes), which may span multiple lines and function like here documents in shells, Perl, and Ruby. Raw string varieties, denoted by prefixing the string literal with r.
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COBOL uses the STRING statement to concatenate string variables. MATLAB and Octave use the syntax "[x y]" to concatenate x and y. Visual Basic and Visual Basic .NET can also use the "+" sign but at the risk of ambiguity if a string representing a number and a number are together. Microsoft Excel allows both "&" and the function "=CONCATENATE(X,Y)".