how to use range function in Python

range function is used to create a list (not a tuple) of integer


to create a list, there are several ways

range(integer value) makes a list of integer (0 based to the integer entered)

input : range(10)
output : [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]




range(start, stop, step) makes a list of integer from start to stop, and +step
input : range(1,10,2)
output : [1, 3, 5, 7, 9]



range(start, stop) makes a list of integer from start up to stop but not including( same as range(start,stop,1) )

input : range(1,10)
output : [1, 2, 3, 4, 5, 6, 7, 8, 9]

how to use for statement in Python

usually for statement is used with range (and xrange)

for var in list or tuple (-> range or xrange)

      statement

for example, to print out

*

**

***

****

  .

  .

*. . . . .****

as many as we want

to do this,

we need two for statement.

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intvalue = input("Enter integer value :")

"""intvalue = int(raw_input("Enter integer value :"))"""

for firstfor in range(intvalue):

    for secondfor in range(firstfor+1):

        print "*",

    print

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