Arrays in JAVA!!!!

1 — DIMENSIONAL Array

// Initializing array

datatype[] varName= new datatype[size];

// Declaring

datatype[] varName= new type[]{values1, value2,…};

Array with Random Variables

double[] a = new double[n];

for(int i=0; i<n;i++)

{

a[i] = Math.random();

}

Maximum value in an Array

double max = 0;

for(int i=0; i<a.length;i++)

{

if(a[i] > max){

max = a[i]; }

}

Reversing an Array

for(int i=0; i<(a.length())/2;i++){

double temp =arr[i];

arr[i]=arr[n-1-i];

arr[n-1-i]=temp;

}

MULTI — DIMENSIONAL ARRAYS

// Initializing

datatype[][] varName = new datatype[row][col];

// Declaring

datatype[][] varName = {{value1, value2…},{value1, value2…}…};

Transposing a Matrix

for{i = 0; i<row;i++){

for(j = 0; j<column;j++){

System.out.print(array[i][j]+” “); }

System.out.println(“ ”);

}

Multiplying two Matrices

for{int i = 0; i<row;i++){

for(int j=0;j<col2;j++){

for(k=0;k<row2;k++){

sum = sum + first[i][k]*second[k][j];

}

multiply[i][j] = sum;

sum = 0; }

}

Hope this article helped to understand Basic Array programs.

Thanks for reading!!!!