A very simple program to print a random number via the Rand crate.

This uses the thread_rng generator seeded by getrandom, thus should be secure (unpredictable).

Example output:

Random u8: 0x6d = 109
Random u16: 0x809c = 32924
Random u32: 0xea319361 = 3929117537
Random u64: 0x376d4c19009b2592 = 3993932114815559058
Random u128: 0x1363867ea3d085cddaec7ebfff77126 = 1610756074077616292812447987608809766
Random i8: 0xb4 = -76
Random i16: 0x7172 = 29042
Random i32: 0x5eb54b98 = 1588939672
Random i64: 0xc5cbc9fae82c5f8f = -4194036548491255921
Random i128: 0x253939a7c460a46b450db1f698ea0575 = 49478566154204815750172915851867063669