37 lines
1.2 KiB
Markdown
37 lines
1.2 KiB
Markdown
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---
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title: Generate Random Fractions with JavaScript
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---
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# Generate Random Fractions with JavaScript
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Random numbers are useful for creating random behavior.
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JavaScript has a `Math.random()` function that generates a random decimal number between 0 (inclusive) and not quite up to 1 (exclusive). Thus `Math.random()` can return a 0 but never quite return a 1.
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## Note
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Like Storing Values with the Equal Operator, all function calls will be resolved before the return executes, so we can return the value of the `Math.random()` function.
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## Instructions
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Change randomFraction to return a random number instead of returning 0.
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## **Warning !!!**
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### **Spoiler Alert !!**
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A solution to follow:
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function randomFraction() {
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// Only change code below this line.
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var result = 0;
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// Math.random() can generate 0. We don't want to return a 0,
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// so keep generating random numbers until we get one that isn't 0
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while (result === 0) {
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result = Math.random();
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}
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return result;
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// Only change code above this line.
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}
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