# Factorial in S-lang

Example for versions
S-lang 2.2.2

This example shows array operations in S-lang. `[1:i]`

creates a list of numbers from 1 to i; note that the default data type for array operations is double even if the numbers are integer. Intrinsic function `prod`

(since version 2.1) returns the product of elements of its parameter. Intrinsic function `sprintf`

provides C-style printing, `%.0f`

printing floating point number with zero digits after decimal comma.

```
for (i=0; i<17; i++)
sprintf ("%d! = %.0f", i, prod ( [1:i] ) );
```

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