String Interpolation with 'f'

Remember when we discussed the printf method when learning how to print? printf is actually a Java method which is recognized by Scala. However, it is unconventional to use printf in Scala as it has its own, arguably better, printf.

The f String Interpolator

The f string interpolator is Scala’s printf. For string interpolation with f, we prepend an f to any string literal. This allows us to create formatted strings. When using the f interpolator, all references to variables and expressions should be followed by a printf-style format string, like %f.

Let’s look at an example:

In the code above, f"the value of pi is $pi%.2f" is a processed string literal. The f prepended before the string is letting the compiler know that the string should be processed using the f interpolator. pi is our variable identifier and %.2f is our format specifier and is formatting the string by telling the compiler to only print the floating-point number pi up to two decimal places.

Try replacing the $2$ ...