[algogeeks] use of ^ in char[]

[shiva]

#include<stdio.h>
int main(){
    char str[]="abcd";
    int i;

    for(i=0;i<6;i++){
            str[i]^=str[6-i];
            }
            printf("\n%s",str);
            getch();
            return 0;
}

i don understand how it works... can u explain if u guys understand..?

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