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In Python, the non-zero value is interpreted as true. None and 0 are interpreted as false.
Program 1: To check whether a given number is positive.
Program1.py
File Edit Format Run Options Window Help
# program to check if number is positive
n=int(input('Enter a number: '))
if (n > 0):
print('Entered number is positive')
# statement outside the if statement
print('All numbers greater than 0 are positive')
On running the above program, you will get the following output:
Output
Enter a number: 6
Entered number is positive
All numbers greater than 0 are positive
Enter a number: -6
All numbers greater than 0 are positive
IF…ELSE STATEMENT
The if…else statement checks for a condition. If the Start
condition evaluates to True, the indented block
following the if statement is executed, otherwise the
indented block after the else statement is executed. if condition
False
Syntax: True
Statements in else
if (conditional expression): Statements in if block execute
block execute
statement(s)
else:
Stop
statement(s)
Conditional Statements in Python 31

