syntax.calc

this four lines sets the output format, or formats:
1)create html, 2)create ascii, 3)create xml, and 4)create tex
latex;
html;
ascii;
xml;
this sets the scientific notation flag for numerical values
the following line creates a variable 'a', and assigns value 2 to it.
a = 2.00000e+00
the following line creates a variable 'b', and assigns the value 3 to it.
b = 3.00000e+00
the following prints a newline

the following line creates a variable 'c', and adds a + b to it.
the following prints a newline, again

the following line prints the equation of variable 'c'
c = a + b
the following line prints the value of the equation of variable 'c'
c = a + b = 2.00000e+00 + 3.00000e+00 = 5.00000e+00