1. The document introduces different types of loops in C including while, do-while, and for loops. It compares the advantages of for loops and provides examples of using for loops. 2. Arrays in C can be one-dimensional, two-dimensional, or multi-dimensional. One-dimensional arrays are declared with a size, and can be initialized at compile-time or run-time. Two-dimensional arrays have rows and columns. 3. Dynamic arrays are created at run-time unlike static arrays which are created at compile-time. Arrays have many uses including searching, sorting, data structures, and passing to functions.

1. Welcome

2. Md. Morshadun Nur
#13203016
BCSE

6. Array & Pointer
Conditional Logic , Looping,
Control string

7. Looping
• As we start Arrays & pointer that’s why we
have to know What is looping & how its
work.
• There are three types of looping
I. While(condition)
II. Do{body of the loop}
while(condition)
III. for(ini;test;inc/dec)
{statement}

8. Comparison of Three Loop
• for(n=1;n<=10;n++)
{
statement;
}
• n=1;
do{
statement;
n=n+1;
}
while(n<=10)
• n=1;
while(n<=10)
{
statement;
n=n+1;
}

9. Advantage of FOR Loop
• For loop in C has several compabilities
that are not found in other loop constructs.
• More than one variable can be initialized
at a time in for statement by comma
operator.
• Null statement for time delay
for(j=100;j<0;j--);

10. Example of for loop
• for(n=1,m=50;n<=m;n=n+1,m=m-1)
{
p=m/n;
printf(“%d%d%dn”,n,m,p);
}
• Sum=0;
for(i=1;i<20&&sum<100;++i)
{
sum=sum+1;…….
}

11. Infinitive Loop
• If the test condition is not present ,the for
loop sets up an infinitive loop.
• Here,
for(m=5;m++)
{
statement;
}

12. Nesting of for Loop
• Nesting of loops
That is one for
statement within
another for statement,
is allowed in C
language.

13. Selecting a Loop
• Pre-test loop or Post-test loop
• Post-test loop;(do….while)
• Pre-test loop;( for, while)
• Counter-based control;(for)
• Sentinel-based control;(while)
*All three control structure implemented on
counter and sentinel control based
system.

14. What is ARRAY
• To Display or Arrange in
a particular way
• Array is a similar type
variable
• Representing a list of
numbers or a list of
names

15. Types of ARRAY
• One dimensional Array
• Two dimensional Array
• Multidimensional Array

16. One Dimensional
How to Declare
Data type variable_name
[Size]
*Size=Declare the fixed
size of variable

17. Initialization Of One Dimensional
Array
At compile time
Data-type Array-
name[size]={a set of
value}
int
car[5]={21,24,45,67,43}
At Run time
• Int main()
{
sum[]={};
for(i=0;i<=10;i++)
{
if i<5
sum[i]=2;
else
sum[i]=5;
}
}

18. Two-Dimensional Array
How to declare
Data type Variable_name
[row_size][column_size]
*row_size=Number of row of
the table
*column_size=Number of
column of the table
Example

19. Multi-screen in front of a programmer

20. Memory layout
3*3 array
We can rearrange it in a
singular dimension by row-
major
10 20 30
40 50 60
70 80 90
10 20 30
40 50 60
70 80 90

21. Multidimensional Array
The elements of a 2*3*3
array
00
0
00
1
00
2
01
0
01
1
01
2
02
0
02
1
02
2
Here, the total element Is
18.
*As it is 3 dimensional
array that’s why every
position has three
reference
10
0
10
1
10
2
11
0
11
1
11
2
12
0
12
1
12
2

22. Multi-dimensional array
• C allows three or
more dimension
*Declaration of
dimension---
Data_type
variable_name
[x1][x2][x3]……[xn]
Example of multi-
dimension
int student [3] [4][5]
float mark_table
[5][4][5][3]
Here, student is a three-
dimensional
mark_table is four-
dimensional

23. Dynamic Array
• Normally we created
arrays at compile time
that can not be
modified and it is
known as static
memory allocation
• In which array that we
creates at run time as
users need that is
known as Dynamic
arrays.

24. Uses of Array
• Searching & Sorting
• Dynamic data structures
• Linked list
• Structures
• Passing arrays as function parameters
• Strings and character arrays

25. ????

26. Thank You