LBEPS Notes 1

1..LBEPS_01_Let's Practice_Solution

1.          Identify the input, processing, and output phases in the following tasks:

l   Calculating the sum of two numbers using a calculator.

Solution:

w   Input:  

First number

‘+’ operator

Second number

‘=’ operator

w   Process:

Calculation of the sum

w   Output:

Sum of the two numbers

l   Obtaining the juice of a fruit using a juicer machine.

Solution:

w   Input:

Fruit

w   Process:

Extraction of the juice

w   Output:

The juice of the fruit

l   Creating knitwear.

Solution:

w   Input:

Knitting wool

w   Process:

Knitting the sweater

w   Output:

Sweater or knitwear

l   Baking bread.

Solution:

w   Input:

Flour, water, flat base, and rolling pin

w   Process:

Kneading the dough using flour and water

Rolling the bread

Baking the bread

w   Output:

Bread

l   Washing clothes in a washing machine.

Solution:

w   Input:

Dirty clothes

Detergent

Water

w   Process:

Washing the clothes

w   Output:

Clean clothes

1.2 Let’s Practice

1.          Write an algorithm to find out whether a number entered by a user is divisible by 5.

Solution:

Step 1: Start the algorithm.

Step 2: Accept a number.

Step 3: Divide the number by 5.

Step 4: If the remainder is 0, the number is divisible by 5.

Step 5: If the remainder is not 0, the number is not divisible by 5.

Step 6: End the algorithm.

2.         Write an algorithm to display the first 10 multiples of 9.

Solution:

Step 1: Start the algorithm.

Step 2: Display 9*1.

Step 3: Display 9*2.

Step 4: Display 9*3.

Step 5: Display 9*4.

Step 6: Display 9*5.

Step 7: Display 9*6.

Step 8: Display 9*7.

Step 9: Display 9*8.

Step 10: Display 9*9.

Step 11: Display 9*10.

Step 12: End the algorithm.

3.         Write an algorithm to find out whether a number entered by a user is even or odd.

Solution:

Step 1: Start the algorithm.

Step 2: Accept a number.

Step 3: Divide the number by 2.

Step 4: If the remainder is 0, the number is even.

Step 5: If the remainder is not 0, the number is odd.

Step 6: End the algorithm.

4.        Write an algorithm to accept two numbers from the user, subtract the first number from the second number, and display the result.

Solution:

Step 1: Start the algorithm.

Step 2: Get the first number.

Step 3: Get the second number.

Step 4: Subtract the first number from the second number.

Step 5: Display the result.

Step 6: End the algorithm.