# JavaScript I

**Over nine weeks, we take you from writing your first javascript program all the way to the most modern tools and techniques. You’ll learn how to make website’s interactive and to write excellent, clean code.**

Below an overview of the week-by-week topics - click on the title to find more details.

{% content-ref url="/pages/-MRuHN93bhsV5JSVHqMP" %}
[1 - Hello Javascript](/courses/introduction-3/course-content/javascript-i/week-1.md)
{% endcontent-ref %}

{% content-ref url="/pages/-MS-Eb4w8HGemO4STqOC" %}
[2 - Expressions and loops](/courses/introduction-3/course-content/javascript-i/week-2.md)
{% endcontent-ref %}

{% content-ref url="/pages/-MS-FHB1BNisfxVV-FSW" %}
[3 - Arrays and callbacks](/courses/introduction-3/course-content/javascript-i/week-3.md)
{% endcontent-ref %}

![](/files/-MSXH28x1rTu4rzFCQqY)


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