 | The first line specifies the interpreter of the script (here the first python program in your path) python hw.py 1.4 # first line is treated as comment ./hw.py 1.4 # first line is used to specify an interpreter |
| Even simple scripts must load modules:
import sys, math |
| Numbers and strings are two different types:
r = sys.argv[1] # r is string s = math.sin(float(r)) # sin expects number, not string r # s becomes a floating-point number |
