exp(n)

Returns the value of Euler's number e raised to the power of n, where e = 2.71828183… The smallest value for n that doesn’t result in 0 is 3e-324. n can be any real numeric value in the range of -1e308 <= n <= 700.

1q = foreach q generate exp(value) as value;
2q = filter q by exp(value) < 5;

1q = group q by exp(value);
2q = order q by exp(value);