Celsius को Fahrenheit में बदलना Python में — code और dry run

Problem statement

Approach 1: simple loop

Apply the formula directly. The order matters exactly as written: multiply first, then add 32 — put brackets around anything you want done earlier.

c = 37

f = c * 9 / 5 + 32
print(f)
# Output: 98.6

Check the anchors as you go: 0°C must give 32°F (freezing point) and 100°C must give 212°F (boiling point). If those two pass, the formula is right.

Approach 2: reusable function

Wrap both directions in functions so the conversion is reusable and testable — and each formula lives in exactly one place.

def to_fahrenheit(c):
    return c * 9 / 5 + 32

def to_celsius(f):
    return (f - 32) * 5 / 9

print(to_fahrenheit(37))     # 98.6
print(to_celsius(98.6))      # 37.0
print(to_fahrenheit(100))    # 212.0

Notice the asymmetry in the brackets: the reverse formula needs (f - 32) grouped because subtraction happens before multiplication would not give the right order.

Approach 3: Pythonic alternative

Real programs convert ranges, not single values — and present them in a tidy table with f-string formatting.

def to_fahrenheit(c):
    return c * 9 / 5 + 32

print(f"{'C':>5} {'F':>7}")
for c in range(-2, 3):
    print(f"{c:>5} {to_fahrenheit(c):>7.1f}")
# Output:
#    -2    28.4
#    -1    30.2
#     0    32.0
#     1    33.8
#     2    35.6

{c:>5} right-aligns in 5 characters and :.1f shows exactly one decimal — a two-character change that turns output into a report.

Dry run

Common errors

• 9 // 5 लिखना — integer division से यह 1 बन जाता है; हर जवाब C + 32 आएगा।
• + 32 भूलना — हर जवाब ठीक 32 degree कम या ज़्यादा।
• आगे की direction में 5/9 लगा देना — वह उल्टे का formula है।
• Reverse formula में brackets न लगाना — बिना bracket गणित ही बदल जाता है।
• input() को float() में न बदलना — temperature दशमलव हो सकता है।

Practice on PyDebug

Concept समझने के बाद इन free problems को browser में solve करें:

• Range boundary practice
• Operator precedence practice
• Variables and assignment practice