請問python中int的意思？

01-29

python小白，剛寫一個，但是必須加上int，請問int是什麼意思？
a=int(input(please enter number))
if a&>=25:

print(6666)
else:
print(5555)

因為input接收的值會轉化為字元型，所以int的作用是強制類型轉化即轉化為整型數據。

學會使用help

Python 3.5.2 (v3.5.2:4def2a2901a5, Jun 25 2016, 22:18:55) [MSC v.1900 64 bit (AMD64)] on win32 Type "help", "copyright", "credits" or "license" for more information. &>&>&> help(int) Help on class int in module builtins:

class int(object) | int(x=0) -&> integer | int(x, base=10) -&> integer | | Convert a number or string to an integer, or return 0 if no arguments | are given. If x is a number, return x.__int__(). For floating point | numbers, this truncates towards zero. | | If x is not a number or if base is given, then x must be a string, | bytes, or bytearray instance representing an integer literal in the | given base. The literal can be preceded by + or - and be surrounded | by whitespace. The base defaults to 10. Valid bases are 0 and 2-36. | Base 0 means to interpret the base from the string as an integer literal. | &>&>&> int(0b100, base=0) | 4 | | Methods defined here: | | __abs__(self, /) | abs(self) | | __add__(self, value, /) | Return self+value. | | __and__(self, value, /) | Return selfvalue. | | __bool__(self, /) | self != 0 | | __ceil__(...) | Ceiling of an Integral returns itself. | | __divmod__(self, value, /) | Return divmod(self, value). | | __eq__(self, value, /) | Return self==value. | | __float__(self, /) | float(self) | | __floor__(...) | Flooring an Integral returns itself. | | __floordiv__(self, value, /) | Return self//value. | | __format__(...) | default object formatter | | __ge__(self, value, /) | Return self&>=value. | | __getattribute__(self, name, /) | Return getattr(self, name). | | __getnewargs__(...) | | __gt__(self, value, /) | Return self&>value. | | __hash__(self, /) | Return hash(self). | | __index__(self, /) | Return self converted to an integer, if self is suitable for use as an index into a list. | | __int__(self, /) | int(self) | | __invert__(self, /) | ~self | | __le__(self, value, /) | Return self&<=value. | | __lshift__(self, value, /) | Return self&<&&>self. | | __rshift__(self, value, /) | Return self&>&>value. | | __rsub__(self, value, /) | Return value-self. | | __rtruediv__(self, value, /) | Return value/self. | | __rxor__(self, value, /) | Return value^self. | | __sizeof__(...) | Returns size in memory, in bytes | | __str__(self, /) | Return str(self). | | __sub__(self, value, /) | Return self-value. | | __truediv__(self, value, /) | Return self/value. | | __trunc__(...) | Truncating an Integral returns itself. | | __xor__(self, value, /) | Return self^value. | | bit_length(...) | int.bit_length() -&> int | | Number of bits necessary to represent self in binary. | &>&>&> bin(37) | 0b100101 | &>&>&> (37).bit_length() | 6 | | conjugate(...) | Returns self, the complex conjugate of any int. | | from_bytes(...) from builtins.type | int.from_bytes(bytes, byteorder, *, signed=False) -&> int | | Return the integer represented by the given array of bytes. | | The bytes argument must be a bytes-like object (e.g. bytes or bytearray). | | The byteorder argument determines the byte order used to represent the | integer. If byteorder is big, the most significant byte is at the | beginning of the byte array. If byteorder is little, the most | significant byte is at the end of the byte array. To request the native | byte order of the host system, use `sys.byteorder as the byte order value. | | The signed keyword-only argument indicates whether twos complement is | used to represent the integer. | | to_bytes(...) | int.to_bytes(length, byteorder, *, signed=False) -&> bytes | | Return an array of bytes representing an integer. | | The integer is represented using length bytes. An OverflowError is | raised if the integer is not representable with the given number of | bytes. | | The byteorder argument determines the byte order used to represent the | integer. If byteorder is big, the most significant byte is at the | beginning of the byte array. If byteorder is little, the most | significant byte is at the end of the byte array. To request the native | byte order of the host system, use `sys.byteorder as the byte order value. | | The signed keyword-only argument determines whether twos complement is | used to represent the integer. If signed is False and a negative integer | is given, an OverflowError is raised. | | ---------------------------------------------------------------------- | Data descriptors defined here: | | denominator | the denominator of a rational number in lowest terms | | imag | the imaginary part of a complex number | | numerator | the numerator of a rational number in lowest terms | | real | the real part of a complex number

善於使用help(),google,stack-overflow以及最重要的http://python.org

https://docs.python.org/3/library/functions.html#int

把你輸入的數據強制轉化為整數如果你輸入了小數它會取前面整數那部分如果你輸入了其他的比如字母什麼的系統會報錯

這樣處理之後這個數據就可以拿來當數字用了，加減乘除比大小之類的

另外這東西也多用於一些一定要用整數的地方，比如表示年齡啊，數量啊之類的

help()的話雖然裡面的英語都很基礎但我是看不懂的?(ˉ?ˉ?) 初學者可以多用谷歌，必應盡量別用百度

最後謝邀謝邀謝邀

a變數中存儲著input中的內容，也就是一個str,而且要和25進行比較，如果你不用int()進行轉化，那你就拿著一個字元串和一個整數進行比較，會產生錯誤。

輸入的值是字元串而不是數字，int將其轉換成數字。