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Diffstat (limited to 'input_output/script.rst')
| -rw-r--r-- | input_output/script.rst | 51 |
1 files changed, 33 insertions, 18 deletions
diff --git a/input_output/script.rst b/input_output/script.rst index bcac6e9..62b7cf3 100644 --- a/input_output/script.rst +++ b/input_output/script.rst @@ -12,24 +12,24 @@ .. 1. Loops .. Author : Nishanth Amuluru - Internal Reviewer : + Internal Reviewer : Puneeth External Reviewer : Checklist OK? : <put date stamp here, if OK> [2010-10-05] Script ------ -Hello friends and welcome to the tutorial on Input/Output +Hello friends and welcome to this tutorial on Input/Output {{{ Show the slide containing title }}} {{{ Show the slide containing the outline slide }}} Input and Output are used in almost every program we use. -In this tutorial, we shall learn +In this tutorial, we shall learn how to - * Outputting data - * Taking input from the user + * Output data + * Take input from the user type :: @@ -38,10 +38,14 @@ type a print a -print a prints the value of a which is obvious. + +``print a``, obviously, is printing the value of ``a``. + As you can see, even when you type just a, the value of a is shown. But there is a difference. +.. #[Amit: The next sentence does seem to be clear enough] + Typing a shows the value of a while print a prints the string. This difference becomes more evident when we use strings with newlines in them. type @@ -57,10 +61,17 @@ While typing print b prints the string and hence the newline. Moreover when we type just a, the value a is shown only in interactive mode and does not have any effect on the program while running it as a script. +.. #[punch: I think we could show that?] + We shall look at different ways of outputting the data. -print statement also accepts the syntax of C's printf statement. + +.. #[Amit: C's printf syntax ?? i think its better to elaborate the + idea] + +print statement in python supports string formatting. Various arguments can be passed to print using modifiers. + type :: @@ -69,7 +80,8 @@ type z = "zed" print "x is %2.1f y is %d z is %s"%(x,y) -As you can see, the values of x and y are substituted in place of %2.1f and %d +As you can see, the values of x and y are substituted in place of +``%2.1f`` and ``%d`` {{{ Pause here and try out the following exercises }}} @@ -77,12 +89,12 @@ As you can see, the values of x and y are substituted in place of %2.1f and %d {{{ continue from paused state }}} -We see that the int value of x and float value of y are printed corresponding -to the modifiers used in the print statement. +We see that the ``int`` value of x and ``float`` value of y are +printed corresponding to the modifiers used in the print statement. -We can also see that print statement prints a new line character at the end of -line, everytime it is called. This can be suppressed by using a "," at the end -print statement. +We can also see that ``print`` statement prints a new line character +at the end of the line, everytime it is called. This can be suppressed +by using a "," at the end ``print`` statement. Let us see this by typing out following code on an editor as print_example.py @@ -168,24 +180,27 @@ prints the string given as argument and then waits for the user input. {{{ Pause here and try out the following exercises }}} -%% 4 %% How do you display a prompt and let the user enter input in a new line +%% 4 %% How do you display a prompt and let the user enter input in next line {{{ continue from paused state }}} .. #[Puneeth: We didn't talk of new-line character till now, did we?] .. #[Puneeth: non-programmers might not know?] +.. #[Amit: Well there is a discussion earlier about new lines, I think its good +.. as a slight trick question. But may be next line is a more easier lexicon] + The trick is to include a newline character at the end of the prompt string. :: ip = raw_input("Please enter a number in the next line\n> ") -prints the newline character and hence the user enters input in the new line +prints the newline character and hence the user enters input in the next line {{{ Show summary slide }}} This brings us to the end of the tutorial. -we have learnt +In this totorial we have learnt * How to print some value * How to print using modifiers @@ -194,9 +209,9 @@ we have learnt {{{ Show the "sponsored by FOSSEE" slide }}} -#[Nishanth]: Will add this line after all of us fix on one. + This tutorial was created as a part of FOSSEE project, NME ICT, MHRD India Hope you have enjoyed and found it useful. -Thankyou +Thank You. |