This example neatly prints the multiplication table with dimensions the user entered. diff --git a/data/GSOC examples/multiplication table b/data/GSOC examples/multip new file mode 100644 index 0000000..4601f01 --- /dev/null +++ b/data/GSOC examples/multiplication table @@ -0,0 +1,69 @@ +import time +import os + +print "This will draw the multiplication table with dimensions of your choice." +print "Feel free to modify and drawing speed and other variables." + +# how many numbers per second? Default is 5. +drawing_speed = 5 + +# raw_input() will get whatever text you enter with your keyboard. +# int() will give an error if it can't turn that text into a number. +try: + print "How many numbers wide?" + x = int(raw_input()) + + print "How many numbers high? " + y = int(raw_input()) +# If there's an error in the "try:" block of code, the following will happen. +# The program will print an error message and quit. +except: + print "That is not a valid number." + sys.exit() + +# In case everything went well, the program didn't quit and is now here. +# The following will create two lists of numbers, each starting with 1 and +# ending with whatever you entered as x ("row" list) and y ("column" list). +# Practice: By default, both lists start with 1. What if we changed that? +row = range(1, x+1) +column = range(1, y+1) + +# From now on, everything we want to print on the screen we'll store +# in the "output" variable. First we make it an empty string, and then add to i +# whatever we want to print. +output = "" +# the first printed line, for decoration: +# add the beginning of it +output += "|-------|--" +# for each number in a row, add eight dashes and mark the end of line with \n +# \n is called a 'newline' and it makes your console start writing a new line. +output += len(row) * "--------" +"\n" +# What the second line starts with. \t marks one tab. +output += "|\t|\t" + +# Now, we would like to print the first row of numbers, which +# represent the factors we'll multiply. Add each number from "row" +# to the output string. str(number) turns a number to characters +# (like number 42 to characters '4' and '2') +for number in row: + output += str(number) + "\t" + +# add another decorative line +output += "\n" + "|-------|--" + len(row) * "--------" + "\n" + +# for each number in the first column, multiply it with each number in the +# first row. One by one, add the results to "output" and print it. +for factor1 in column: + output += "| " + str(factor1) + "\t|\t" + for factor2 in row: + output += str(factor1*factor2) + "\t" + # clear the screen from what was last printed (old output) so + # we can print the new output (with one result added) + os.system('clear') + print output + # Pause the program. If "drawing_speed" is 5, it will pause for + # 1/5 seconds (0.2 seconds), which gives us five characters + # per seconds. + time.sleep(1.0 / drawing_speed) + # mark the end of the line + output += "\n"