Constant functions

Constant functions are used to define constant values like Pi or True.

• Const - constant values for a domain unit
• True
• False
• Pi
• Null
• null_b - the Null value as a uint8 data item
• null_w - the Null value as a uint16 data item
• null_u - the Null value as a uint32 data item
• null_u64 - the Null value as a uint64 data item
• null_c - the Null value as a int8 data item
• null_s - the Null value as a int16 data item
• null_i - the Null value as a int32 data item
• null_i64 - the Null value as a int64 data item
• null_f - the Null value as a float32 data item
• null_d - the Null value as a float64 data item
• null_sp - the Null value as a spoint data item
• null_wp - the Null value as a wpoint data item
• null_ip - the Null value as an ipoint data item
• null_up - the Null value as an upoint data item
• null_fp - the Null value as an fpoint data item
• null_dp - the Null value as a dpoint data item
• null_str - the Null value as a string data item