format string kotlin

To format a string in Kotlin, you can use string interpolation or the format() function. Here are the steps to format a string in Kotlin:

1. Start by defining the string that you want to format. For example, let's say we have the following string: val name = "John" val age = 30 val message = "My name is $name and I am $age years old."

2. In the above example, we have used string interpolation to format the string. The variables name and age are enclosed in curly braces preceded by the dollar sign within the string. This allows us to directly include the values of the variables in the string.

3. Another way to format a string is by using the format() function. This function takes the format string as its argument and replaces any placeholders with the corresponding values. For example: val name = "John" val age = 30 val message = "My name is %s and I am %d years old.".format(name, age)

4. In the above example, the %s is a placeholder for a string value, and %d is a placeholder for an integer value. The format() function replaces these placeholders with the values of the variables name and age, respectively.

5. You can also specify the order of the placeholders by using indices. For example: val name = "John" val age = 30 val message = "My name is %2\$s and I am %1\$d years old.".format(age, name)

6. In the above example, %2\$s refers to the second argument, which is name, and %1\$d refers to the first argument, which is age. The indices are followed by a dollar sign and a backslash.

7. Lastly, you can include formatting options within the placeholders. For example: val pi = 3.14159 val message = "The value of pi is approximately %.2f.".format(pi)

8. In the above example, %.2f is a placeholder for a floating-point value with two decimal places. The format() function formats the value of pi accordingly.

These are the steps to format a string in Kotlin using string interpolation and the format() function.