Interpolation is the process of inserting a variable's value within a string. To perform string interpolation in Julia, the variable's name is enclosed in curly braces, {} inside the string. Here's an example:
name = "Alice"
age = 25
println("My name is $name and I'm $age years old.")
Output:
My name is Alice and I'm 25 years old.
In the above example, the variables name and age are interpolated into the string using the $ symbol inside the string.
Alternatively, you can also use the $(expression) syntax to interpolate complex expressions into the string. Here's an example:
radius = 10
println("The area of a circle with radius $radius is $(pi*radius^2).")
Output:
The area of a circle with radius 10 is 314.1592653589793.
Here, the expression pi*radius^2 is evaluated and its result is interpolated into the string.