## Loop  Statement

Python supports two types of loops
1. For 
2. While 

### For Loop 
- For loop iterate over a given sequence such as list, string, tuple dictionary or any iterable object.
- For loops can iterate over a sequence of numbers using the **range** and  **xrange** functions.

Syntax:
```python
for variable in (iterable object) :
  print(variable)
```
Normally for range function contain three different parameter
1. starting number
2. Stop number+1
3. difference or step number(optional if not given then it will increment by 1)

Example 1
if you want to print 0 to 10 numbers using for loop
```python
for i in range(11):
  print(i)
``` 
Output:
```
0
1
2
3
4
5
6
7
8
9
10
```

If we do not give the starting number and difference by default range function start from 0 and increment it by 1 until the given number.

Example 2
if you want to print 2 to 20 with difference 2
```python
for i  in range(2,21,2):
  print(i)
  
```
Output:
```
2
4
6
8
10
12
14
16
18
20
```
range function consider starting given no as it is (include starting number as it is given) but exclude stop number so we always provide ending number by incrementing 1.

### For Loop on String 
if you want to print every character or alphanumeric values as one by one we can easily print using for loop.
```python
mystring="I am python student"
for st in mystring:
  print(st)
```

Output:
```
I
 
a
m
 
p
y
t
h
o
n
 
s
t
u
d
e
n
t
```

### For loop on List 
```python
mylst=[4,6,3,9,3]
for i in mylst:
  print(i)
```

Output:
```
4
6
3
9
3
```
### Some Examples On For Loop

prints out the numbers 0,1,2,3,4,5,6
```python
for x in range(7):
  print(x)
```

Output:
```
0
1
2
3
4
5
6
```

prints out 2,3,4,5,6,7
```python
for x in range(2, 8):
  print(x)
```

Output:
```
2
3
4
5
6
7
```

prints out 3,6,9
```python
for x in range(3, 11, 3):
  print(x)
```

Output:
```
3
6
9
```