Write a C Program to define string using various methods.

#include<stdio.h> 
int main () {
    char c1[] = "abcd";
    char c2[50] = "abcd";
    char c3[] = {'a', 'b', 'c', 'd', '\0'};
    char c4[5] = {'a', 'b', 'c', 'd', '\0'};
    printf("c1= %s\n", c1);
    printf("c2= %s\n", c2);
    printf("c3= %s\n", c3);
    printf("c4= %s\n", c4);
}