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SOME FORTRAN FUNCTIONS
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                                              TYPE OF           TYPE OF VALUE    |                 | RESULT OF
FUNCTION       DESCRIPTION                    ARGUMENT(S)       (RETURN VALUE)   | EXAMPLE         | EXAMPLE
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ABS(x)         Absolute value of x            Integer or Real   Same as argument | ABS(-1.55)      | 1.5500000
REAL(x)        Conversion of x to real type   Integer           Real             | REAL(15)        | 15.000000
INT(x)         Integer part of x              Real              Integer          | INT(4.68)       | 4
SQRT(x)        Square root of x               Real              Real             | SQRT(2.77)      | 1.664332
EXP(x)         Exponential function, e**x     Real              Real             | EXP(-1.4)       | 0.2465970
LOG(x)         Natural logarithm of x, lnx    Real              Real             | LOG(3.5)        | 1.252763
LOG10(x)       Logarithm for base 10          Real              Real             | LOG10(3.5)      | 0.5440680
COS(x)         Cosine    of x radians         Real              Real             | COS(0.5)        | 0.8775826
SIN(x)         Sine      of x radians         Real              Real             | SIN(0.5)        | 0.4794255
TAN(x)         Tangent  of x radians          Real              Real             | TAN(0.5)        | 0.5463025
ACOS(x)        Angle whose cosine  is x       Real              Real             | ACOS(0.5)       | 1.047198
ASIN(x)        Angle whose sine    is x       Real              Real             | ASIN(0.5)       | 0.5235988
ATAN(x)        Angle whose tangent is x       Real              Real             | ATAN(0.5)       | 0.4636476
MOD(x,y)       x (mod y); x - INT(x/y)*y      Integer or Real   Same as argument | MOD(255,8)      | 7
MAX(x1,...,xn) Maximum of x1,...,xn           Integer or Real   Same as argument | MAX(3,5,7,12,4) | 12 
MIN(x1,...,xn) Minimum of x1,...,xn           Integer or Real   Same as argument | MIN(-8.5,1.1,0.)| -8.500000
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