Programs · Program 5-9
Q.Program 5-9: Program to show explicit type conversion.
Punjab PsebTextbookSubjective· 2mImportance★★★★★est
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Start your 14-day free trial to unlock the full solution →One program, all three conversion functions: float() widens an int, int() narrows a float, and int()/str() decide whether "5" and 7 are added (12) or joined (75).
The idea (explicit type conversion). Python gives one conversion function per basic type — int(), float(), str() — and the programmer calls them deliberately whenever the current type is not the needed one. The most instructive part is that the same two values can produce completely different results depending on which way you convert, because the resulting types choose the meaning of the operator.
Program
# prog5-9.py
# Program to show explicit type conversion
a = 7 # int
b = 3.0 # float
c = "5" # str
print(float(a)) # int -> float
print(int(b)) # float -> int
print(int(c) + a) # str -> int : arithmetic addition
print(str(a) + c) # int -> str : string concatenation
Expected output
7.0
3
12
75
Line-by-line reasoning
| Line | Conversion | Result | Why |
|---|---|---|---|
float(a) | int → float | 7.0 | widening; value preserved, gains .0 |
int(b) | float → int | 3 | narrowing; fractional part truncated |
int(c) + a | str → int | 12 | "5" becomes 5, so + is addition: 5 + 7 |
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