REAL(A, KIND)

Purpose

Convert to real type.

Class

Elemental function

Argument type and attributes

A

An INTENT(IN) INTEGER, REAL, COMPLEX or boz-literal CONSTANT

KIND (optional)

An INTENT(IN) INTEGER scalar. The actual argument corresponding to KIND must be a constant expression.

Result type and attributes

• Real.
• Case (i): If A is of type integer or real and KIND is present, the kind type parameter is that specified by KIND. If A is of type integer or real and KIND is not present, the kind type parameter is the kind type parameter of the default real type.
• Case (ii): If A is of type complex and KIND is present, the kind type parameter is that specified by KIND. If A is of type complex and KIND is not present, the kind type parameter is the kind type parameter of A.
• Case (iii): If A is a boz-literal constant and KIND is present, the kind type parameter is that specified by KIND. If A is a boz-literal constant and KIND is not present, the kind type parameter is that of default real type. If -qxlf2003=nobozlitargs is specified the boz-literal constant is treated as an integer.

Result value

• Case (i): If A is of type integer or real, the result is equal to a kind-dependent approximation to A.
• Case (ii): If A is of type complex, the result is equal to a kind-dependent approximation to the real part of A.
• Case (iii): If A is a boz-literal constant, the value of the result is equal to the value that a variable of the same type and kind type parameters as the result would have if its value were the bit pattern specified by the boz-literal constant.

In Fortran 2008, you can use designator%RE to access the real part of complex numbers directly; for instance, A%RE has the same value as REAL(A). For more information about complex part designators, see Complex.