Python try Keyword

By IncludeHelp Last updated : December 07, 2024

Description and Usage

The try is a keyword (case-sensitive) in python, it is a part of "try...except" block, it is used to define a block (of coding statements) to test/check whether this block contains an exception or not. If try block contains an exception program's control moves to the except block.

Syntax

Syntax of try keyword:

try:
  statement(s)-1
except:
  statement(s)-2

While executing the statement(s)-1, if there is any exception raises, control jumps to except block and statement(s)-2 executes.

Sample Input/Output

Input:
a = 10
b = 0

try:
  # no error
  result = a%b
  print(result)
    
except:
  print("There is an error")

Output:
There is an error

Example 1

Find modulus of two number and handle exception, if divisor is 0.

# python code to demonstrate example of 
# try, except keyword  

# Find modulus of two number and 
# handle exception, if divisor is 0

a = 10
b = 3

try:
    # no error
    result = a%b
    print(result)
    
    # assign 0 to b
    # an error will occur
    b = 0
    result = a%b
    print(result)
    
except:
    print("There is an error")

Output

1
There is an error

Example 2

try:
    # Attempt to open a file that doesn't exist
    file = open("nonexistent.txt", "r")
    content = file.read()
    print(content)
except FileNotFoundError:
    # Handle the exception
    print("Error: File not found!")

Output

Error: File not found!