Toggle case of each character in String | C program

#include <stdio.h> int main(){ char strin[100]; int i; printf("enter a string to toggle: "); fgets(strin, 100, stdin); for(i=0;strin[i]!=NULL;i++) { if(strin[i]>='A'&& strin[i]<='Z') strin[i]+=32; else if(strin[i]>='a'&&strin[i]<='z') strin[i]-=32; } printf("String after toggle is: %s",strin); return 0; }

Bhuvan Arora