100 cls
110 print "e     = ";exp(1)' e  not available
120 print "PI    = ";4*arctan(1)' pi not available
130 x = 12.345
140 y = 1.23
150 print "sqrt  = ";sqr(x)' square root
160 print "ln    = ";log(x)' natural logarithm base e
170 print "log10 = ";log(x)/log(10)' base 10 logarithm
180 print "log   = ";log(x)/log(y)' arbitrary base logarithm
190 print "exp   = ";exp(x)' exponential
200 print "abs   = ";abs(-x)' absolute value
210 print "floor = ";floor(x)' floor
220 print "ceil  = "; : ceil(x)' ceil easily implemented as function
230 print "power = ";x^y ' power
240 end
250 sub ceil(x)
260   if x < 0 then print int(x) else print int(x)+1
270 end sub