The application of for loop and if judgment statement

0 introduction

stay python in , We learned and mastered for Circulation and if The judgment of the , They can help us solve some math problems around us .

1 problem

Output the number of all daffodils .

2 Method

It needs to be used twice for Cycle design . for the first time for The purpose of circulation is to make i Take all three digits , The second time is right i Traversal cycle , Loop out each traversal j use sum Proceed incrementally , And then determine sum Whether the value of is the same as i equal , Finally, the number of daffodils is output .

3 Experimental results and discussion

Through the experiment 、 Practice has proved that the proposed method is effective , Is able to solve the problem raised at the beginning .

Code list 1

for i in range(100,1000): sum = 0 for j in str(i):    sum += int(j)**3 if sum ==i:    print(i)

4 Conclusion

utilize for Circulation and if The judgment of the , Make us to for Circular statements and if The use of judgment sentences is more skilled .