@ val pi = scala.math.Pi
pi: Double = 3.141592653589793
@ f"$pi%012.2f"
res23: String = "000000003.14"
@ val d = 2
d: Int = 2
@ f"$pi%012.${d}f"
cmd25.sc:1: Missing conversion operator in '%012'; use %% for literal %, %n for newline
val res25 = f"$pi%012.${d}f"
^
Compilation Failed
How do i use a variable to specify format string?