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Python function and loop example code
Python Function and Loop Example code
#!/usr/bin/python
#A function is created with the def keyword
def function():
pass
#-------------------------------------------------------
def printme( str ):
"This prints a passed string into this function"
print (str)
return
# Now you can call printme function
printme("I'm first call to user defined function!")
printme("Again second call to the same function")
#-------------------------------------------------------
# Function definition is here
def changeme( mylist ):
"This changes a passed list into this function"
print ("Values inside the function before change: ", mylist)
mylist[2]=50
print ("Values inside the function after change: ", mylist)
return
# Now you can call changeme function
mylist = [10,20,30]
changeme( mylist )
print ("Values outside the function: ", mylist)
#-------------------------------------------------------
# Function definition is here
def printinfo( name, age ):
"This prints a passed info into this function"
print ("Name: ", name)
print ("Age ", age)
return
# Now you can call printinfo function
printinfo( age=50, name="miki" )
#-------------------------------------------------------
print "1 + 1 =", 1 + 1
print "2 * (2 + 3) =", 2 * (2+3)
print "1.2 / 0.3 =", 1.2 / 0.3
print "5 / 2 =", 5 / 2
# 1 + 1 = 2
# 2 * (2 + 3) = 10
# 1.2 / 0.3 = 4.0
# 5 / 2 = 2
#functions
def square(number):
sqr_num = number **2
return sqr_num
input_num = 5
output_num = square(input_num)
print "print output", output_num
#function morethan one input
def returnDifference(n1, n2):
"""Return the difference between two numbers.
Subtracts n2 from n1."""
return n1 - n2
print "print output", returnDifference(1,1)
def add_two_numbers(num1, num2):
sum = num1 + num2
return sum
print "print output", add_two_numbers(1,1)
print "print output", add_two_numbers(1,2)
#loop
n = 1
while (n < 5):
print "n =", n
n = n +1
print "Loop finished "
for n in range(1, 5):
print"n =", n
print "Loop finished "
for i in range(0, 4):
if i == 2:
break
print i
print "Finished with i = ", str(i)
phrase = "it marks the spot"
for letter in phrase:
if letter == "ks":
print "yes ks"
break
else:
print "There was no 'X' in the phrase"
tries = 0
while tries < 3:
password = raw_input("Password: ")
if password == "ednalan":
break
else:
tries = tries +1
else:
print "Suspicious activity. The authorities have been alerted."
total = 0 # This is global variable.
# Function definition is here
def sum( arg1, arg2 ):
# Add both the parameters and return them."
total = arg1 + arg2; # Here total is local variable.
print ("Inside the function local total : ", total)
return total
# Now you can call sum function
sum( 10, 20 )
print ("Outside the function global total : ", total )
#-------------------------------------------------------------------
def add_two_numbers(num1, num2):
sum = num1 + num2
return sum
print(add_two_numbers(1,1)) #2
#---------------------------------------------------------------------
n = 1
while (n < 5):
print("n =", n)
n = n + 1
print("Loop finished")
#---------------------------------------------------------------------
numbers = [22, 34, 12, 32, 4]
sum = 0
i = len(numbers)
while (i != 0):
i -= 1
sum = sum + numbers[i]
print "The sum is: ", sum
#---------------------------------------------------------------------
import random
while (True):
val = random.randint(1, 30)
print val, # 14 14 30 16 16 20 23 15 17 22
if (val == 22):
break
#---------------------------------------------------------------------
import random
num = 0
while (num < 1000):
num = num + 1
if (num % 2) == 0:
continue
print num,
#---------------------------------------------------------------------
import random as rnd
for i in range(10):
print rnd.randint(1, 10), # 1 2 5 10 10 8 2 9 7 2
def root(x):
return x * x
#---------------------------------------------------------------------
def root(x):
return x * x
a = root(2)
b = root(15)
print a, b
#---------------------------------------------------------------------
x = 15
def function():
global x
x = 45
function()
print x # 45
#---------------------------------------------------------------------
print 4 in (2, 3, 5, 6)
for i in range(25):
print i, # 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
#---------------------------------------------------------------------
def gen():
x = 11
yield x
it = gen()
print it.next() # 11
#---------------------------------------------------------------------
def showModuleName():
print __doc__
def getModuleFile():
return __file__
a = showModuleName()
b = getModuleFile()
print a, b
#---------------------------------------------------------------------
def f():
"""This function prints a message """
print "Today it is a cloudy day"
print isinstance(f, object) # True
print id(f) # 3077407212
print f.func_doc # This function prints a message
print f.func_name # f
#---------------------------------------------------------------------
from math import sqrt
def cube(x):
return x * x * x
print abs(-1)
print cube(9)
print sqrt(81)
#---------------------------------------------------------------------
def showMessage(msg):
print msg
def cube(x):
return x * x * x
x = cube(3)
print x # 27
showMessage("Computation finished.") # Computation finished.
print showMessage("Ready.") # Ready.
#---------------------------------------------------------------------
n = [1, 2, 3, 4, 5]
def stats(x):
mx = max(x)
mn = min(x)
ln = len(x)
sm = sum(x)
return mx, mn, ln, sm
mx, mn, ln, sm = stats(n)
print stats(n) # (5, 1, 5, 15)
print mx, mn, ln, sm # 5 1 5 15
#---------------------------------------------------------------------
def C2F(c):
return c * 9/5 + 32
print C2F(100) # 212
print C2F(0) # 32
print C2F(30) # 86
#---------------------------------------------------------------------
def power(x, y=2):
r = 1
for i in range(y):
r = r * x
return r
print power(3) # 9
print power(3, 3) #27
print power(5, 5) # 3125
#---------------------------------------------------------------------
def display(name, age, sex):
print "Name: ", name
print "Age: ", age
print "Sex: ", sex
display("Lary", 43, "M") # Name: Lary Age: 43 Sex: M
display("Joan", 24, "F") # Name: Joan Age: 24 Sex: F
