Scalar. Converts a given string into a float.
real ( string )
| string | A valid string must be a sequence of digits, optionally containing a decimal-point character. The input may also include an optional minus sign as the first character, or an optional exponent part, which itself consists of an 'e' or 'E' character followed by an optional sign and a sequence of digits. |
Converts a given string into a float. The function takes a string as its argument, and the function returns a float. An invalid string causes the function to return NULL.
real ('43.4745') returns 43.4745.