bc doesn't do floating point but it does do fixed precision decimal numbers: it doesn't round. precision of fractional numbers is given by scale, defaults to 0:

1/2
0
scale=2
1/2
.50

with -l a math library will be loaded (providing sine, cosine and some more) and scale will be set to 20.

c-like programmming language, supports loops, functions and stuff:

scale=1
for (m=70; m<=100; m++) m/(1.85^2)

control output w/ print:

print var1, " ", var2