We use
def keyword to define a function. general syntax is like
def functionname(params):
statement1
statement2
Let us write a function which will take two integers as input and then return the sum.
>>> def sum(a, b):
... return a + b
In the second line with the
return keyword, we are sending back the value of
a + b to the caller. You must call it like
>>> res = sum(234234, 34453546464)
>>> res
34453780698L
Remember the palindrome program we wrote in the last chapter. Let us write a function which will check if a given string is palindrome or not, then return
True or
False.
#!/usr/bin/env python
def palindrome(s):
return s == s[::-1]
if __name__ = '__main__':
s = raw_input("Enter a string: ")
if palindrome(s):
print "Yay a palindrome"
else:
print "Oh no, not a palindrome"
