Floats

Floats represent approximate real numbers. Binary floating-point cannot exactly store many decimal fractions, so a direct equality comparison can surprise you. For money, store integer minor units such as cents or use a decimal arithmetic library; round only at a deliberate presentation or business-rule boundary. The example uses a tolerance when comparing approximate measurements rather than expecting exact equality. Further guidance Inspect a value before relying on an implicit conversion. Keep input validation separate from casting, use strict comparisons when type matters, and choose an explicit representation for values such as money or optional data. Try normal, empty, and unexpected inputs so the result is deliberate. Practice task: Create a fresh example for Floats. Predict the result before running it, then change one input and explain why the result changes. Test a normal case and one boundary or invalid case where it applies. Compare your output with the example and note one rule you would use in a real project.