Explain me Multidimensional Array Plx ??

Question

// plz explain this code Also
int[ ][ ] myArr = { {1, 2, 3}, {4}, {5, 6, 7} };
myArr[0][2] = 42;
int x = myArr[1][0]; // 4

Answer 1

Multi dimensional array can be described as 'array of array'

int[ ][ ] myArr = { {1, 2, 3}, {4}, {5, 6, 7} };
//above statement is consist of three array
to access first array we have to use index value 0 and to access first element of that array we have to use myArr[0][0] where 1st 0 index value for array selection and next 0 index value for first element of that array
myArr[0][0]={1,2,3}
myArr[0][1]={4}
myArr[0][2]={5,6,7}

myArr[0][2] = 42;
// here 42 is assigned to first array third element so now the first array will be
myArr[0][0]={1,2,42}
int x = myArr[1][0]; // It will output 4 because second array is selected which first element is 4
so output is 4

Answer 2

think of the array contents like:
{1 2 3}
{4}
{5 6 7}
now you could say myArr[ y ][ x ] refers to y=line and x=position in that line

myArray[0][2] accesses line 0 @ position 2
-> {1 2 3} will become {1 2 42}
int x = myArr[1][0] gets the value out of line 1, position 0

Just keep in mind that indexes start with 0 (instead of 1 like most humans count)

Answer 3

thank you so much dearz