Rapid Introduction to Procedural Programming in Java

Make UPC-A Supplement 2 in Java Rapid Introduction to Procedural Programming
1 Rapid Introduction to Procedural Programming
UPC-A Generator In Java
Using Barcode maker for Java Control to generate, create Universal Product Code version A image in Java applications.
Once we know how many rows and columns the user requires and the minimum and maximum values of the random numbers they want, we are ready to do the processing
Creating Bar Code In Java
Using Barcode drawer for Java Control to generate, create bar code image in Java applications.
row = 0 while row < rows: line = "" column = 0 while column < columns: i = randomrandint(minimum, maximum) s = str(i) while len(s) < 10: s = " " + s line += s column += 1 print(line) row += 1
Scanning Barcode In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
To generate the grid we use three while loops, the outer one working by rows, the middle one by columns, and the inner one by characters In the middle loop we obtain a random number in the speci ed range and then convert it to a string The inner while loop is used to pad the string with leading spaces so that each number is represented by a string 10 characters wide We use the line string to accumulate the numbers for each row, and print the line after each column s numbers have been added This completes our second example Python provides very sophisticated string formatting functionality, as well as excellent support for for in loops, so more realistic versions of both bigdigitspy and generate_gridpy would have used for in loops, and generate_gridpy would have used Python s string formatting capabilities rather than crudely padding with spaces But we have limited ourselves to the eight pieces of Python introduced in this chapter, and they are quite suf cient for writing complete and useful programs In each subsequent chapter we will learn new Python features, so as we progress through the book the programs we will see and be capable of writing will grow in sophistication
GS1 - 12 Encoder In .NET
Using Barcode encoder for ASP.NET Control to generate, create UPC A image in ASP.NET applications.
str format()
Universal Product Code Version A Creator In .NET
Using Barcode generator for .NET framework Control to generate, create UPC A image in .NET applications.
78
Making USS Code 128 In Java
Using Barcode creation for Java Control to generate, create Code 128C image in Java applications.
Summary
EAN 128 Generation In Java
Using Barcode encoder for Java Control to generate, create UCC.EAN - 128 image in Java applications.
In this chapter we learned how to edit and run Python programs and reviewed a few small but complete programs But most of the chapter s pages were devoted to the eight pieces of Python s beautiful heart enough of Python to write real programs We began with two of Python s most basic data types, int and str Integer literals are written just as they are in most other programming languages String
Painting Barcode In Java
Using Barcode generator for Java Control to generate, create bar code image in Java applications.
Summary
Barcode Generation In Java
Using Barcode maker for Java Control to generate, create bar code image in Java applications.
literals are written using single or double quotes; it doesn t matter which as long as the same kind of quote is used at both ends We can convert between strings and integers, for example, int("250") and str(125) If an integer conversion fails a ValueError exception is raised; whereas almost anything can be converted to a string Strings are sequences, so those functions and operations that can be used with sequences can be used with strings For example, we can access a particular character using the item access operator ([]), concatenate strings using +, and append one string to another using += Since strings are immutable, behind the scenes, appending creates a new string that is the concatenation of the given strings, and rebinds the left-hand string object reference to the resultant string We can also iterate over a string character by character using a for in loop And we can use the built-in len() function to report how many characters are in a string For immutable objects like strings, integers, and tuples, we can write our code as though an object reference is a variable, that is, as though an object reference is the object it refers to We can also do this for mutable objects, although any change made to a mutable object will affect all occurrences of the object (ie, all object references to the object); we will cover this issue in 3 Python provides several built-in collection data types and has some others in its standard library We learned about the list and tuple types, and in particular how to create tuples and lists from literals, for example, even = [2, 4, 6, 8] Lists, like everything else in Python, are objects, so we can call methods on them for example, evenappend(10) will add an extra item to the list Like strings, lists and tuples are sequences, so we can iterate over them item by item using a for in loop, and nd out how many items they have using len() We can also retrieve a particular item in a list or tuple using the item access operator ([]), concatenate two lists or tuples using +, and append one to another using += If we want to append a single item to a list we must either use listappend() or use += with the item made into a single-item list for example, even += [12] Since lists are mutable, we can use [] to change individual items, for example, even[1] = 16 The fast is and is not identity operators can be used to check whether two object references refer to the same thing this is particularly useful when checking against the unique built-in None object All the usual comparison operators are available (<, <=, ==, !=, >=, >), but they can be used only with compatible data types, and then only if the operations are supported The data types we have seen so far int, str, list, and tuple all support the complete set of comparison operators Comparing incompatible types, for example, comparing an int with a str or list, will quite sensibly produce a TypeError exception Python supports the standard logical operators and, or, and not Both and and or are short-circuit operators that return the operand that determined their
Printing Code 3/9 In Java
Using Barcode generator for Java Control to generate, create ANSI/AIM Code 39 image in Java applications.
ISSN - 13 Maker In Java
Using Barcode creation for Java Control to generate, create International Standard Serial Number image in Java applications.
Draw Bar Code In Visual Studio .NET
Using Barcode printer for .NET Control to generate, create bar code image in VS .NET applications.
Making DataMatrix In Visual Basic .NET
Using Barcode printer for Visual Studio .NET Control to generate, create Data Matrix image in .NET applications.
Barcode Drawer In .NET Framework
Using Barcode creator for ASP.NET Control to generate, create barcode image in ASP.NET applications.
UPC Code Generator In VS .NET
Using Barcode drawer for ASP.NET Control to generate, create GS1 - 12 image in ASP.NET applications.