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5. Math logexp

Available inall subroutines.

Computes the value of 2 raised to the x power (e.g., 2ˣ).

This is equivalent to shifting the integer 1 to x bits to the left (e.g., 2^x == 1 << x), except that math.exp2 is only for FLOAT type values.

Example

vcl_deliver {
  declare local var.foo FLOAT;
  set var.foo = math.exp2(32); # result: 4294967296.0
}