Remove Speace from Input String in C

#include<stdio.h>

int main()
{
    int i,j=0;
    char str[100];
    printf("Please Enter a String :\n");
    gets(str);

    for(i=0;str[i]!='\0';++i)]
    {
        if(str[i]!=' ')
            str[j++]=str[i];
    }

    str[j]='\0';

    printf("\nString After Removing Spaces:\n\n%s\n",str);

    return 0;
}