2: Loops

2.1 One to 10

Write a function that prints the numbers 1 to 10

2.1.1 Example

 1: oneToTen()
 2:  *** Output ***
 3: 1
 4: 2
 5: 3
 6: 4
 7: 5
 8: 6
 9: 7
10: 8
11: 9
12: 10

2.2 One to 10 across

In Python 3, you can use the end=”” parameter in print to prevent a newline at the end of a print(). For example, print(“frog”,end=””) will print frog without moving to the next line. Use that to write a function that prints the numbers 1 to 10 across the screen as shown

2.2.1 Example

1: oneToTenAcross()
2:  *** Output ***
3: |1 |2 |3 |4 |5 |6 |7 |8 |9 |10 |

2.3 Odd Numbers

Write a function that prints the positive odd numbers less than 20

2.3.1 Example

 1: oddNumbers()
 2:  *** Output ***
 3: 1
 4: 3
 5: 5
 6: 7
 7: 9
 8: 11
 9: 13
10: 15
11: 17
12: 19

2.4 Square Numbers

Write a function that prints the square numbers up to 100

2.4.1 Example

 1: squares()
 2:  *** Output ***
 3: 1
 4: 4
 5: 9
 6: 16
 7: 25
 8: 36
 9: 49
10: 64
11: 81
12: 100

2.5 Random Numbers

Write a for loop to print out four random integers between 1 and 10

2.5.1 Example

1: random4()
2:  *** Output ***
3: 3
4: 5
5: 2
6: 8

2.6 Even Numbers < n

Write a function to print out the positive even numbers less than n

2.6.1 Example

 1: even(20)
 2:  *** Output ***
 3: 2
 4: 4
 5: 6
 6: 8
 7: 10
 8: 12
 9: 14
10: 16
11: 18

2.7 Powers of 2

Write a function to print out the powers of 2 from 21 up to 2n

2.7.1 Example

 1: powers(8)
 2:  *** Output ***
 3: 2
 4: 4
 5: 8
 6: 16
 7: 32
 8: 64
 9: 128
10: 256

2.8 Are we there yet?

Write a program that outputs “Are we there yet?” and then waits for input. If the input is “Yes” the program outputs “Good!” and exits, otherwise the program loops.

2.8.1 Example

1: "Are we there yet?"
2: No
3: "Are we there yet?"
4: Spoons
5: "Are we there yet?"
6: Yes
7: Good!

2.9 Triangle

Write a function that uses nested loops to produce the following pattern.

1: triangle()
2:  *** Output ***
3: *
4: **
5: ***
6: ****
7: *****

2.10 Table Square

Write a function that prints out a 4 x 4 table square

2.10.1 Example

1: tableSquare()
2:  *** Output ***
3: A 4 x 4 table square
4: | 1 | 2 |  3 |  4 |
5: | 1 | 2 |  3 |  4 |
6: | 2 | 4 |  6 |  8 |
7: | 3 | 6 |  9 | 12 |
8: | 4 | 8 | 12 | 16 |

2.11 Table Squares

Extend your answer to the last question produce a function that will print out a n x n table square

2.11.1 Example

1: tableSquares(6)
2:  *** Output ***
3: A 6 x 6 table square
4: | 1 |  2 |  3 |  4 |  5 |  6 |
5: | 2 |  4 |  6 |  8 | 10 | 12 |
6: | 3 |  6 |  9 | 12 | 15 | 18 |
7: | 4 |  8 | 12 | 16 | 20 | 24 |
8: | 5 | 10 | 15 | 20 | 25 | 30 |
9: | 6 | 12 | 18 | 24 | 30 | 36 |

Published by Tony Ballantyne

Writer and Tech blogger

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