Python first day: Programming concepts, Python Introduction and installation, Python variables, python operators

First, the content

Second, exercise: 1, use while loop output 1, 2, 3, 4, 5, 6, 8, 9, 10

Method One:
Description: When Count equals 7 o'clock, Count plus 1, the value of Count is 8, and then continue the following code is not executed, skip the loop back to the beginning to continue the loop.

Count = 1while count<11:    if Count = = 7:        count + = 1         continue    print (count)    count + = 1

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Method Two:
Description: Prints the value of count when count is not equal to 7 o'clock

Count = 1while count<11:    if Count! = 7:        print (count)    count + = 1

2. For all numbers of 1-100

Method One:

Description: With a For loop, first define an initial value to receive the result of the calculation, add the result of each loop and assign the value to the initial value

sum = 0 # Sets the initial value of a total number for the calculation of the total number of results for I in range (1,101): # Sets the range of loop 1-100    sum = sum + i  # to add and assign the results of each loop to Sumprint (sum)

Method Two:

Description: With a while loop, the first definition defines an initial value that is used to receive the result of the calculation, adding and assigning the result of each loop to the initial value

Count = 1 # Sets an initial value of sum = 0   # Sets the initial value of a total number to store the calculated result of the total number while count < 101: # Sets the range of loop 1-100    sum = sum + count # let each loop The result is added and assigned to sum    count + = 1  # count self-Increment 1 operation print (sum)

3. All the even numbers in the output 1-100

For I in Range (1,101):    If I% 2 = = 0:        print (i)

4. All the odd numbers in the output 1-100

For I in Range (1,101):    If I% 2! = 0:        print (i)

5, to seek the 1-2+3-4+5-6...99 of all the number and

Method One:

Count = 1sum = 0while Count <:    if count% 2 = = 0:        sum = sum-count # all negative even and    else:        sum = sum + cou NT # all odd and    count + = 1print (sum)

Method Two:

sum = 0for i in range (1,100):    if I% 2 = = 0:        sum = sum-i # all negative even and    else:        sum = sum + I # all odd and print ( Sum

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Http://www.cnblogs.com/fyknight/p/7967436.html

Python first day: Programming concepts, Python Introduction and installation, Python variables, python operators