Question

Write an algorithm and flow chart to swap two numbers without using third variable

Answer 1

Algorithm with out using a third variable

Step 1: Start

Step 2: Read the value of Number1,Number2

Step 3: Number1= Number1 + Number2

Step 4: Number2= Number1 - Number2

Step 5: Number1= Number1 - Number2

Step 6: PRINT the value of Number1 and Number2

Step 7: Stop

Flowchart Attached below.

Answer 2

Answer:

Explanation:

Swapping :

Swapping is the process of altering the values of two variables interchangeably.

Algorithm:

An algorithm is a process used to carry out a computation or solve a problem. Algorithms function as a precise list of instructions that carry out defined activities in a step-by-step fashion.

Algorithm for swapping without third variable:

Step 1 : Declare two variables $a$ and $b$

Step 2 : Get the values for the declared variables from the user

Step 3: Print the values entered by user.

Step 4 :Perform addition and subtraction to perform swapping of values as follows:

Step 4.1 : $a=a+b$

Step 4.2 : $b=a-b$

Step 4.3 :$a=a-b$

Step 5 : Print the swapped values of $a$ and $b$

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5deac8f1ca7bf45e74ab47c05445afdd.doc