Not understanding the shifting part

#1

why did we move j to end of the array ?
also i dont understand what is happening in
while(j>=i+2){
a[j+2]=a[j];
j–;
}

how are we copying from right to left i dont understand

#2

hi @chitranshanmol07
pi occupies 2 characters
3.14 occupies 4 characters
so we have to make some extra space to accomodate this
to do that, we shift all the characters to the right side by 2 places. This shift is done most efficiently and easily when we start from the right side.
Do a dry run of this code for more clarification

#3

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