In Groovy, the $() syntax is used for string interpolation. It allows for the evaluation of expressions inside a string. When using this syntax, any Groovy expression contained within the $() will be evaluated and the result will be included in the final string. This can be a convenient way to dynamically construct strings with variable values or the results of calculations.
Best Groovy Books to Read in December 2024
How to escape special characters in the $() syntax in Groovy?
To escape special characters in the $() syntax in Groovy, you can use the backslash \ character. For example, if you want to include a literal dollar sign within the $() syntax, you can escape it like this:
1
|
println "The price is \$100"
|
This will output:
1
|
The price is $100
|
Similarly, you can escape other special characters like parentheses or backticks in the same way.
How to print variables using the $() syntax in Groovy?
In Groovy, you can print variables using the $() syntax within a double-quoted string.
Here is an example:
1 2 3 4 |
def name = "John" def age = 30 println "My name is ${name} and I am ${age} years old." |
When you run this code, it will print:
1
|
My name is John and I am 30 years old.
|
This syntax allows you to easily include variables within a string without the need for concatenation.
How to customize the output format of variables using the $() syntax in Groovy?
In Groovy, you can customize the output format of variables using the $() syntax by using String interpolation. Here's an example of how you can use this syntax to customize the output format of variables:
1 2 3 4 5 |
def name = "John" def age = 30 def formattedOutput = "Name: ${name}, Age: ${age}" println formattedOutput |
In this example, the ${} syntax is used to include the variables name and age in the formattedOutput string. You can also customize the output format by adding formatting specifiers inside the ${} syntax. For example:
1 2 3 |
def amount = 1000.5 def formattedAmount = "Amount: $${amount.format('%,.2f')}" println formattedAmount |
In this example, the amount variable is formatted as a currency value with two decimal places using the %.2f formatting specifier.
You can refer to the Groovy documentation for more information on formatting specifiers and other options for customizing the output format of variables using String interpolation in Groovy.
