Ruby String Interpolation

Feel free to run the example below to see the sample in action.

Ruby string interpolation. Interpolation allows ruby code to appear within a string. Ruby provides a feature called string interpolation that lets you substitute the result of ruby code into the middle of a string. 197 add decimal value 197 to a string å. String interpolation works only when we use double quotes for the string formation.

Using string interpolation when concatenating strings and variables the output can be hard to read and debug. Ruby calls the to s method on the string interpolation block this tells the object to convert itself into a string. It is essential to be able to replace placeholders within a string with values they represent. If you type the code above in your editor and syntax highlighting for ruby code is used it should highlight the code in the double quoted string so it gives you a visual clue about the interpolation.

So why do people prefer string interpolation. Concatenation looks like this. Ruby provides another way to inject variable values into a string called string interpolation that addresses both of these issues. In this case a b c creates a new string.

In ruby string interpolation is extremely easy. String interpolation allows easier and more intuitive string formatting and content specification compared with string concatenation. A nice to meet you b c do you like blueberries a b c nice to meet you do you like blueberries you can use the operator to append a string to another. Ruby string interpolation last updated.

For characters with decimal values you can do this. String interpolation it is all about combining strings together but not by using the operator. String interpolation is common in many programming languages which make heavy use of string representations of data such as apache groovy kotlin perl php python ruby scala swift tcl and most unix shells. Interpolation works within double quoted ruby strings.

A marker consists of a hash mark also known as a pound sign an opening curly. And it does not work in single quoted strings. Anywhere you want within the string you can include an interpolation marker. String interpolation provides an easy way to process string literals.