programming-for-dummies

Branching Statements 565
Table 3-5 (continued)
Assignment Operator Purpose Example
*= Multiplication assignment i *= y (equivalent to i = i * y)
/= Division assignment i /= 3.5 (equivalent to i = i / 35)
%= Modulo assignment i %= 2.8 (equivalent to i = i % 2.8)
Branching Statements
The simplest branching statement is an IF statement that only runs one or
more commands if a Boolean condition is True. In Perl, the IF statement
uses curly brackets to enclose one or more commands:
Book VI
Chapter 3
Perl and Python
if (condition) {
Command1;
Command2;
}
In Python, the IF statement uses indentation to enclose one or more
commands:
if (condition):
Command1
Command2
To make the computer choose between two mutually exclusive sets of
commands, you can use an IF-ELSE statement in Perl like this:
if (condition) {
Command;
Command;
}
else {
Command;
Command;
}
In Python, the IF-ELSE statement looks like this:
if (condition):
Command
Command
else:
Command
Command