Simple if statement:
Simple if is the simplest of all decision making statements. Condition should be in the form of relational or logical expression.
Syntax:
if :
statements – block 1
In the above syntax if the condition is true statements
– block 1 will be executed.
Example
# Program to check the age and print whether eligible for voting
x = int (input (“Enter your age :”))
if x > = 18:
print (“You are eligible for voting”)
Output 1:
Enter your age: 34 You are eligible for voting
Output 2:
Enter your age: 16
>>>
As you can see in the second execution no output will be printed, only the Python prompt will be displayed because the program does not check the alternative process when the condition is failed.
if..else statement:
The if., else statement provides control to check the true block as well as the false block. Following is the syntax of ‘if.else’ statement.
Syntax:
if:
statements – block 1
else:
statements – block 2
if..else statement thus provides two possibilities and the condition determines which BLOCK is to be executed.
Example: #Program to check if the accepted number odd or even
a = int(input(“Enter any number :”)) if a%2==0:
print (a, ” is an even number”)
else:
print (a, ” is an odd number”)
Output 1:
Enter any number: 56 56 is an even number
Output 2:
Enter any number: 67 67 is an odd number An alternate method to rewrite the above program is also available in Python. The complete if.else can also written as:
Syntax:
variable = variable 1 if condition else variable 2
