Intrinsic function of fortran

• Function	Meaning	Arg. Type	Return Type
  ABS(x)	absolute value of x	INTEGER	INTEGER
  		REAL	REAL
  SQRT(x)	square root of x	REAL	REAL
  SIN(x)	sine of x radian	REAL	REAL
  COS(x)	cosine of x radian	REAL	REAL
  TAN(x)	tangent of x radian	REAL	REAL
  ASIN(x)	arc sine of x	REAL	REAL
  ACOS(x)	arc cosine of x	REAL	REAL
  ATAN(x)	arc tangent of x	REAL	REAL
  EXP(x)	exp(x)	REAL	REAL
  LOG(x)	natural logarithm of x	REAL	REAL

  Note that all trigonometric functions use radian rather than degree for measuring angles. For function ATAN(x), x must be in (-PI/2, PI/2). For ASIN(x) and ACOS(x), x must be in [-1,1].
  
• Conversion functions:
  

  Function	Meaning	Arg. Type	Return Type
  INT(x)	integer part x	REAL	INTEGER
  NINT(x)	nearest integer to x	REAL	INTEGER
  FLOOR(x)	greatest integer less than or equal to x	REAL	INTEGER
  FRACTION(x)	the fractional part of x	REAL	REAL
  REAL(x)	convert x to REAL	INTEGER	REAL

• Other functions:
  

  Function	Meaning	Arg. Type	Return Type
  MAX(x1, x2, ..., xn)	maximum of x1, x2, ... xn	INTEGER	INTEGER
  		REAL	REAL
  MIN(x1, x2, ..., xn)	minimum of x1, x2, ... xn	INTEGER	INTEGER
  		REAL	REAL
  MOD(x,y)	remainder x - INT(x/y)*y	INTEGER	INTEGER
  		REAL	REAL