The document provides an overview of conditional control and loop control in MATLAB, detailing the use of statements like if, elseif, and else to determine code execution based on conditions. It includes examples of conditional statements for evaluating height, calculating discounts, checking voltage signals, and comparing two input values. Additionally, the document explains how to assign grades based on input marks.

1. Matlab Scripts

2.  Conditional control – if, else, switch
 Loop control – for, while, continue, break
 Program termination – return
2
if, else, and elseif for while

3. if test statement
statements
elseif test statement
statements
else
statements
end
3
if I == J
A(I,J) = 2;
elseif abs(I-J) ==
1
A(I,J) = -1;
else
A(I,J) = 0;
end
• Conditional statements are commands that allows MATLAB to
decide whether or not to execute some code that follows the
statement
• Conditional statements use relational operators like
==,~=,>,< (Note that are all scalar tests)

4.  If the
conditional
expression is
true, MATLAB
runs the lines of
code that are
between the
line with if
and the line
with end.
 If the
conditional
expression is
false, MATLAB
skips the code
between if
and the line
with else and
runs the code up
to end.

5. height=input(‘Plz enter the height:‘)
if height>170
disp('tall')
elseif height<150
disp('small')
else
disp('average')
end

6. A program to make a discount of 20% if the no. of
books are greater than 5
clc;
books=input(‘Enter the no of Books: ');
cost=books*25;
if books > 5
cost=(1 -20/100)*cost; % 20% discount
disp(cost)
end

7. The following program check if the input digital voltage signal
is positive or not.
V=input(‘Please Enter the Voltage: ')
if V < 5 % If voltage is less than 5 V
out_1 = 0 %Output is zero
elseif V == 5 % If voltage is equal to 5 V
out_1 = 0.5 % Output is o.5
else
out_1 = 1 % In other cases output is 1
end

8. Write a MATLAB program to input the values of x,y then
print 'y is greater than x‘ if y is greater and 'x is greater
than y‘ if x is greater and 'x =y‘ if they are equal.
clear all,clc;
x=input('enter the value x ');
y=input('enter the value y ');
if (x<y)
disp ('y is greater than x');
elseif (x>y)
disp ('x is greater than y');
else
disp ('x is =y');
end

9.  Program to find grade from the mark
s=input('Enter the Mark: '); % enter the mark
if s>= 90
disp ('Grade: A');
elseif s>=80
disp ('Grade: B');
elseif s>=70
disp ('Grade: C');
elseif s>=60
disp ('Grade: D');
else
disp ('Grade: F');
end
9

10. Shameer Koya