# MATLAB for Beginners – Volume-1 – MATLAB Basics – Tutorials

## Basic Math Calculations

``````>> a=1;     % Assign 1 to a
>> b=2;      % Assign 2 to b
>> c=a+b    % Skipping semicolon at the end displays the result
c =
3``````

### Subtraction

``````>> d=a-b

d =
-1``````

### Multiplication

``````>> e=a*b

e =
2``````

### Division

``````>> a=23     % Skip the semicolon at the end to display the value
a =
23

>> b=5;    % Type semicolon at the end to avoid displaying the value

>> c=a/b
c =
4.6000

>> d=rem(a,b)
d =
3``````

### Rounding Off Numbers – Floor

``````>> c = 4.6;
>> floor(c)  % Rounds off towards negative infinity
ans =
4

>> floor(-5.43) % Rounds off towards negative infinity
ans =
-6``````

### Rounding Off Numbers – Ceiling

``````>> c = 4.6;
>> ceil(c)	% Rounds off towards positive infinity
ans =
5

>> ceil(-5.43)	 % Rounds off towards positive infinity
ans =
-5``````

### Rounding Off Numbers – Round

``````>> round(-5.43)	 % Rounds off towards nearest integer
ans =
-5
>> round(5.43)	 % Rounds off towards nearest integer
ans =
5
>> round(5.5)	  % Rounds off towards nearest integer
ans =
6``````

### Rounding Off Numbers – Fix

``````>> fix(-5.43)	% Rounds off towards zero

ans =
-5

>> fix(5.5)		% Rounds off towards zero

ans =      5
``````

### Decimal Points

``````>> a=22/7
a =
3.1429

>> format long
>> a=22/7
a =
3.142857142857143

>> format short
>> 22/7
ans =
3.1429``````

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