fn history(his_cmds: &Vec<String>){
    for cmd in his_cmds{
        print!("{}",cmd);
    }
}
/***********************************************************
 * Function: history
 * Description: To show the valid list of commands that have been executed (current session).
 * ***********************************************************/
history
Description: To show the valid list of commands that have been executed (current session).
history Description : To show the valid list of commands that have been executed ( current session ) .
fn history(his_cmds: &Vec<String>){
    for cmd in his_cmds{
        print!("{}",cmd);
    }
}
fn history ( his_cmds : & Vec < String > ) { for cmd in his_cmds { print ! ( " " cmd ) ; } }
Function: history
 Description: To show the valid list of commands that have been executed (current session).
Function : history Description : To show the valid list of commands that have been executed ( current session ) .
his_cmds
&Vec<String>