Python: range function

range( ) in Python:

• it is a predefined function in python
• range( ) function generating the group of values.
• range value stores the group of values.
• range value starting from zero( 0 ) by default.

type 1: 

pass one parameter or value,that value is ending value and that value is exclusive.

syntax: 

                 range(stop)

example:

range(3)

output:

range(0, 3)

Retrieve the one by one values from range by using for loop.

Example:

x=range(3)

for p in x:

    print(p)

Output:

0

1

2

Example:

x=range(3)

print(id(x))

print(type(x))

for p in x:

    print(p)

    print(type(p))

    print(id(p))

Output:

55317392

<class 'range'>

0

<class 'int'>

1926046384

1

<class 'int'>

1926046416

2

<class 'int'>

1926046448

type 2:

pass two parameters or values, first parameter or value take starting value,it is inclusive.

second parameter or value take stop value,it is exclusive.

syntax:

               range(start,stop)

here by default increment by 1

Example:

y=range(1,5)

for p in y:

    print(p)

Output:

1

2

3

4

type 3:

pass 3 parameters or values,first parameter/value takes start value,it is inclusive.

second parameter/value takes stop value,it is exclusive.

third value take step,increment/decrement value.

syntax:

                        range(start,stop, [step] )

Example:

z=range(0,10,2)

for p in z:

    print(p)

Output:

0

2

4

6

8

Example:

a=range(5,0,-1)

for p in a:

    print(p)

Output:

5

4

3

2

1

Example:

a=range(0,5,-1)

for p in a:

    print(p)

Output:

no output 

How to use range function in for loop:

Example:

for p in range(5):

    print(p)

Output:

0

1

2

3

4

Example:

for p in range(0,5):

    print(p)

Output:

0

1

2

3

4

Example:

for p in range(0,5,2):

    print(p)

Output:

0

2

4

Example:

for p in range(5,0,-2):

    print(p)

Output:

5

3

1