Swift Number Output

Swift Introduction

🔢 Swift Number Output

In Swift number output means displaying numeric values (like Int, Double, Float) on the console using print() or related methods.

 1. Printing Integer Numbers


Output

25

 2. Printing Decimal Numbers

Swift supports Double and Float.


 

Output

99.99
36.6

 3. Printing Multiple Numbers Together


 

Output

10 20

 4. Number Output with Text (String Interpolation)

👉 Most important & recommended way


Output

Marks obtained: 85

 5. Arithmetic Result Output

You can directly print calculations.


Output

15
12
24
5

 6. Integer vs Decimal Division

⚠️ Very important concept


Output

3
3.3333333333333335

 7. Formatting Number Output (Decimals)

Limit decimal places using String(format:).

Output

3.14

 8. Printing Optional Numbers

 9. Using debugPrint() for Numbers


Used mainly for debugging (same output for simple numbers).

❌ Common Mistakes

Wrong ❌

let age = 25
print("Age: " + age) // Error

Correct ✅

print("Age: \(age)")

🧠 Summary

TaskMethod
Print integerprint(num)
Print decimalprint(Double)
Text + numberString interpolation
Arithmetic outputDirect print
Decimal controlString(format:)

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