PHYS 580   COMPUTATIONAL PHYSICS  SPRING 2005

Intrinsic functions for Fortran

powers

x**n   = x^N (n an integer)

x**y   = x^y (y a real number, x real, nonnegative)

Note: trig functions are all in radians, not degeees

sin(x)

cos(x)

tan(x)

asin(x)

atan(x)

Log function is to base e, not base 10!

log(x)

log10(x)      this is log base 10!

exp(x)

Other

sqrt(x) same as x**0.5 (but more efficient)

abs(x)

real(n) or float(n) converts integer n to a real (floating point) number

int(x) converts real value to an integer value