Doubt doubt doubt

[parth_tyagi]

string s;

s += arr[ i ] + " "; —> ese string me space add nahi ho rahi digits ke beech me.

But,

s = s + arr[ i ] + " "; --> ese ho rahi h. Reason ???

[asaurabh_26 (logical coder)]

@parth_tyagi

s += arr[ i ] + " ";

in this case right side
arr[i]+" "; this is not valid
+ operator works on string only

@parth_tyagi

s = s + arr[ i ] + " "; --> ese ho rahi h. Reason ???

in this case at right side
one of the operand is string hence + operator is valid
so this works