What is an Array in C -Tccicomputercoaching.com

What is an Array in C TCCICOMPUTERCOACHING.COM

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tccicomputercoaching.com  In programming Language there is variable used to store data. This variable is

one type of memory location, where we store the data, but variable can store only one data at a time, So, if we want to store more than one data at a time, then we can use array.  Arrays a kind of data structure that can store a fixed-size sequential collection

of elements of the same type.  An array is used to store a collection of data, but it is often more useful to

think of an array as a collection of variables of the same type.

tccicomputercoaching.com  To declare an array in C, a programmer specifies the type of the elements and

the number of elements required by an array as follows −  typearrayName [ arraySize ];  This is called a single-dimensional array. The arraySize must be an integer

constant greater than zero and type can be any valid C data type. For example, to declare a 10-element array called A of type float, use this statement −  Float A[3];

tccicomputercoaching.com  Here A is a variable array which is sufficient to hold up to 3float numbers.  How data store in Memory:  Array always stores data in memory position wise or as per index. Index start

always from 0.  A[0]A[1]A[2]  Int student[5];  Here, we store int data type data in array named student. Data store for 5

student.

tccicomputercoaching.com  Initializing Arrays  We can assign values to the array, when declare array, It is called Initializing

Arrays.  i.e. datatypearray[size]={ values….};  int student[5]={ 12,45,67,23,90};  int student[]={12,56,98};  We can keep blank also size of array in initialization, compiler can count its

maximum size from initialization values.

tccicomputercoaching.com  Input Values for Array:  We have to use array in for loop because array has more than one values.  For (i=0; i<=n; i++)  {

Scanf(“%d”, &student[i]);

  }

 Here, loop executes n times and input values n times, stores values into the

given address.

tccicomputercoaching.com  Output Values for Array:  Same as input values as for output values;  For (i=0; i<=n; i++)  {   }

printf(“%d”, student[i]);

tccicomputercoaching.com  Example of Array programme to enter data and display data.  #include <stdio.h>  int main () {  int n[ 10 ]; /* n is an array of 10 integers */  inti,j; 

/* initialize elements of array n to 0 */

 for ( i = 0; i< 10; i++ ) {  n[ i ] = i + 100; /* set element at location i to i + 100 */ 

}

tccicomputercoaching.com  Example of Array programme to enter data and display data.  /* output each array element’s value */  for (j = 0; j < 10; j++ ) {  printf(“Element[%d] = %d\n”, j, n[j] ); 

}

 return 0;  }

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