Fibonacci numbers in bc

Example for versions bc 1.06

This example uses Binet’s formula. Note that bc is an arbitrary-precision calculator, so after floating-point calculations the numbers have to be rounded to integers. This has to be done manually, since bc doesn’t provide built-in rounding. 

for (n = 1; n <= 16; n++) {
    scale = 10
    x = (((1 + sqrt(5)) * .5) ^ n - ((1 - sqrt(5)) * .5) ^ n) / sqrt(5)
    scale = 0
    print (x+0.5)/1; ", "
    if (n==16) print "..."
}