Page 68 - Computer Genius Class 07
P. 68
To reach the final output you need to ollo the algorithm step y step.
Explanation: Read the two numbers “num1 and num2” that needs to be swapped. Assign the value
of num1 to a temporary variable called “temp” and the value of num2 to num1. Then, assign value of
“temp” to num2. Finally, Print the values of num1 and num2 which are now swapped.
If you follow the steps correctly in sequence, you will achieve the output. Skipping any step from this
sequence or altering the sequence will lead to errors in the program or generation of wrong output.
This is how sequencing in programming works.
Let’s take the example of Selection:
Example: seudocode to chec i the citi en is senior citi en or not on the asis o age entered y
the user. erson is considered a senior citi en i his her age is a o e years old.
int age = 61:
if (age>=60)
print erson is a senior citi en
else
print erson is not a senior citi en
Explanation: n this the pseudocode ill chec i the person is a senior citi en or not on the asis o
age entered by the user.
If you follow the sequence of pseudocode, you will see that the program makes a “selection” of
hich o to enter depending on the age defined in the program.
If the age is more than or equal to 60, the program enters the if block. If the age is less than 60, the
program enters else block.
Example: Flowchart to print all the natural numbers from 1 to 100.
Start
Input N
FOR 1<num*2
IF
1%2 !=0
SUM = SUM+1
Print SUM
Stop
66 Computer Genius-VII

