The badge printerZara and Leo make name badges for open day, and Bo's printer prints any text it is given. Text in quotes has a name: it is called a string. A string is a row of characters, like beads on a string, and letters, spaces and digits all count. Leo wants a badge that says Zara Bo, so Zara joins two strings with plus. The badge comes out as ZaraBo, with no space at all, because plus joins strings exactly as written. A space is a character too, and it can sit inside quotes all alone. Zara joins Zara, a space and Bo, and the badge says Zara Bo. Then Bo wants to know how long a word is, so Zara uses a tool called len, which counts the characters.