Page 137 - Standard Handbook Of Petroleum & Natural Gas Engineering

122 Mathematics

Table 1-27
FORTRAN Intrinsic Functions
Integer
IABS Returns the absolute value of an argument
IDlM Returns the positive difference between two arguments
IDINT Converts a double-precision argument to integer by truncation
IFlX Converts a real argument to integer by truncation
INT Truncates the decimal part of an argument
ISlGN Transfers the sign from one integer argument to the other
MAX0 Selects the largest value of several arguments
MAXI Selects the largest value of several -arguments, but converts any real
result to integer
MlNO Selects the smallest value of several arguments
MIN1 Selects the smallest value of several arguments, but converts any real
result to integer
MOD Returns the remainder from division of two arguments
Real

ABS Returns the absolute value of an argument
ACOS Returns the arc cosine of an argument
AIMAG Returns the imaginary part of a complex number
AlNT Truncates the decimal part of an argument
ALOG Returns the natural logarithm of an argument
ALOG 10 Returns the common logarithm of an argument
AMAXl Seiects the largest value of several arguments
AMlNl Selects the smallest value of several arguments
AMOD Returns the remainder from division of two arguments
ANINT Returns the whole number nearest in value to the argument
ASlN Returns the arc sine of an argument
ATAN Returns the arc tangent of an argument
ATAN2 Returns the arc tangent of two arguments [arctan(a,/a,)]
cos Returns the cosine of an argument
COSH Returns the hyperbolic cosine of an argument
DIM Returns the positive difference between two arguments
EXP Returns the exponential e raised to the power of the argument
FLOAT Converts an argument to a real number
NlNT Returns the nearest integer value
REAL Converts a complex argument to a real value
SIGN Transfers the sign from one argument to the other
SIN Returns the sine of an argument
SlNH Returns the hyperbolic sine of an argument
SQRT Returns the square root of an argument
SNGL Converts a double precision argument to single precision
TAN Returns the tangent of an argument
TANH Returns the hyperbolic tangent of an argument
Double Precision

DABS Returns the absolute value of an argument
DACOS Returns the arc cosine of an argument