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3. Array
Definition :
Array is a collection of similar data-type. Arrays can be created from any of the C data- types int, float, and char. So an integer array can only hold integer values and cannot hold
values other than integer.
There are basically two types of an array:
1. One dimensional array.
2. Two dimensional array.
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4. Single / One Dimension Arrays
Syntax :
datatype name_of_array [size] ;
Type of the array
Name of the
Size specify how many
i.e int,char,float
array
elements will be in array
Example :
int marks[30] ;
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5. Example : One Dimension Arrays
#include <stdio.h>
#include<conio.h>
Output:
int main() {
Enter Array Element 1
int x[10];
printf(“Enter Array Elements”) 2 3
for(i=0;i<10;i++) { 4 2
scanf(" %d ", &x[i] ); initialization.
// run time 3 } 23 34 } 12 34
getch();
return 0; }

6. Two Dimension Arrays int marks[30][30] ;
Syntax :
datatype name_of_array [size][size] ;
Type of the array
Name of the
Number
Number
i.e int,char,float
array
of rows
of rows
Example :
int marks[30][30] ;
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7. Example : Two Dimension Arrays
#include<stdio.h>
#include<conio.h>
int main() {
int array[2][2] = {
1,2 ,
3,4
Output:
} ; //two dimensional array declaration
Array contents are:
int i=0,j=0;
Array[0][0]=1
printf(“\nArray contents are͗”) ;
Array[0][1]=2 Array[0][0]=3 Array[0][0]=4
for(i=0;i<=1;i++) //Outer for loop to count number of rows {
for(j=0;j<=1;j++) //Inner for loop to count number of rows {
printf(“array*%d+*%d+=%d\t”, i,j,array[i][j]);
//Displaying values at location ith row and jth column }
printf(“\n”); }
getch();
return 0;
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8. String char name [30] ; Char name_of_array [size] ; Syntax :
Character Array
Name of Array
Size specify how many elements will be in array
Example :
char name [30] ;
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9. Example : String #include<stdio.h> #include<conio.h>
int main() {
char string*30+=“Hello world”; int i=0;
Output: String is Hello world
printf(“\nString is %s”,string); //printing string using %s
getch();
return 0; }
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