"Python" Understanding loops: For,while

First look at the for structure:

# !/usr/bin/python # -*-coding:utf-8-*-  for  in range (1):    Print i

Output:

0

Input and output:

# !/usr/bin/python # -*-coding:utf-8-*-  for  in range (1, ten):    Print i

#输出: 1 2 3 4 5 6 7 8 9

Input and output:

# !/usr/bin/python # -*-coding:utf-8-*-  for  in range (1, 2):    print  i,# output: 1 3 5 7 9

Summarize:

The meaning of the range ([start=0], stop, [step=1]) function:

1, starting from start, to stop end, step is step;

2, if range has only one parameter, then start from 0 to stop-1 end;

3,step default step is 1, can be re-written to 2 or more;

4, starting point contains start, end point does not contain stop, to stop-1 cutoff (start <= i < stop)

"Python" Understanding loops: For,while