INT

Intel® Fortran Compiler Classic and Intel® Fortran Compiler Developer Guide and Reference

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ID 767251

Date 3/22/2024

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INT

Elemental Intrinsic Function (Generic): Converts a value to integer type.

result = INT (a[,kind])

a	(Input) Must be of type integer, real, or complex, or a binary, octal, or hexadecimal literal constant.
kind	(Input; optional) Must be a scalar integer constant expression.

Results

The result type is integer. If kind is present, the kind parameter of the result is that specified by kind; otherwise, the kind parameter of the result is shown in the following table. If the processor cannot represent the result value in the kind of the result, the result is undefined.

Functions that cause conversion of one data type to another type have the same effect as the implied conversion in assignment statements.

The result value depends on the type and absolute value of a as follows:

If a is of type integer, INT(a) = a.
If a is of type real and | a | < 1, INT(a) has the value zero.

If a is of type real and | a | >=1, INT(a) is the integer whose magnitude is the largest integer that does not exceed the magnitude of a and whose sign is the same as the sign of a.
If a is of type complex, INT(a) is the value obtained by applying the preceding rules (for a real argument) to the real part of a.
If a is a binary, octal, or hexadecimal literal constant, the value of the result is the value whose bit sequence according to the model in Bit Model is the same as that of a as modified by padding or truncation according to the following:
- If the length of the sequence of bits specified by a is less than the size in bits of a scalar variable of the same type and kind type parameter as the result, the binary, octal, or hexadecimal literal constant is treated as if it were extended to a length equal to the size in bits of the result by padding on the left with zero bits.
- If the length of the sequence of bits specified by a is greater than the size in bits of a scalar variable of the same type and kind type parameter as the result, the binary, octal, or hexadecimal literal constant is treated as if it were truncated from the left to a length equal to the size in bits of the result.

Specific Name ¹	Argument Type	Result Type
	INTEGER(1), INTEGER(2), INTEGER(4)	INTEGER(4)
	INTEGER(1), INTEGER(2), INTEGER(4), INTEGER(8)	INTEGER(8)
IJINT	INTEGER(4)	INTEGER(2)
IIFIX²	REAL(4)	INTEGER(2)
IINT	REAL(4)	INTEGER(2)
IFIX ^{3, 4}	REAL(4)	INTEGER(4)
JFIX	INTEGER(1), INTEGER(2), INTEGER(4), INTEGER(8), REAL(4), REAL(8), REAL(16), COMPLEX(4), COMPLEX(8), COMPLEX(16)	INTEGER(4)
INT ^{5, 6, 7}	REAL(4)	INTEGER(4)
KIFIX	REAL(4)	INTEGER(8)
KINT	REAL(4)	INTEGER(8)
IIDINT	REAL(8)	INTEGER(2)
IDINT ^{6, 8}	REAL(8)	INTEGER(4)
KIDINT	REAL(8)	INTEGER(8)
IIQINT	REAL(16)	INTEGER(2)
IQINT^{6, 9}	REAL(16)	INTEGER(4)
KIQINT	REAL(16)	INTEGER(8)
	COMPLEX(4), COMPLEX(8), COMPLEX(16)	INTEGER(2)
	COMPLEX(4), COMPLEX(8), COMPLEX(16)	INTEGER(4)
	COMPLEX(4), COMPLEX(8), COMPLEX(16)	INTEGER(8)
INT1¹⁰	INTEGER(1), INTEGER(2), INTEGER(4), INTEGER(8), REAL(4), REAL(8), REAL(16), COMPLEX(4), COMPLEX(8), COMPLEX(16)	INTEGER(1)
INT2¹⁰	INTEGER(1), INTEGER(2), INTEGER(4), INTEGER(8), REAL(4), REAL(8), REAL(16), COMPLEX(4), COMPLEX(8), COMPLEX(16)	INTEGER(2)
INT4¹⁰	INTEGER(1), INTEGER(2), INTEGER(4), INTEGER(8), REAL(4), REAL(8), REAL(16), COMPLEX(4), COMPLEX(8), COMPLEX(16)	INTEGER(4)
INT8¹⁰	INTEGER(1), INTEGER(2), INTEGER(4), INTEGER(8), REAL(4), REAL(8), REAL(16), COMPLEX(4), COMPLEX(8), COMPLEX(16)	INTEGER(8)
¹These specific functions cannot be passed as actual arguments. ²This function can also be specified as HFIX. ³The setting of compiler options specifying integer size or real size can affect IFIX. ⁴For compatibility with older versions of Fortran, IFIX is treated as a generic function. ⁵Or JINT. ⁶The setting of compiler options specifying integer size can affect INT, IDINT, and IQINT. ⁷Or JIFIX. ⁸Or JIDINT. For compatibility with older versions of Fortran, IDINT can also be specified as a generic function. ⁹Or JIQINT. For compatibility with older versions of Fortran, IQINT can also be specified as a generic function. ¹⁰For compatibility, these functions can also be specified as generic functions.

If the argument is a binary, octal, or hexadecimal constant, the result is affected by the assume old-boz option. The default option setting, noold-boz, treats the argument as a bit string that represents a value of the data type of the intrinsic, that is, the bits are not converted. If setting old-boz is specified, the argument is treated as a signed integer and the bits are converted.

Example

INT (-4.2) has the value -4.

INT (7.8) has the value 7.

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