1. Explain the difference:
-int: int is the abbreviation of integer, which stands for integer type. It refers to a number without a decimal part.
-float: float is the abbreviation of floating point number, which stands for floating point type. It refers to a number with a decimal part.
Example:
-int: I'm 25 this year. ? (I am 25 years old. )
-Fu: My weight is 63.5 kilograms. My weight is 63.5 kilograms. )
2. Differences in usage:
-int: int is usually used to represent integer values, such as counting, indexing, etc.
-float: float is usually used to represent numerical values with decimal parts, such as measurement, calculation and so on, which need more accurate numerical values.
Example:
-int: This program calculates the factorial of an integer variable. This program calculates the factorial of an integer variable. )
-float: This program calculates the area of a circle and the result is a floating point number. This program calculates the area of a circle and generates a floating-point number. )
3. Use environmental differences:
-int: When precise integer calculation or variable storage of integer type is needed, int is usually used.
-float: float is usually used when data containing decimals need to be processed and more accurate calculation and representation are needed.
Example:
-int: This loop calculates the sum of all elements in an integer array. This loop calculates the sum of all elements in an integer array. )
-float: this program simulates the free-falling motion of an object and uses floating-point numbers for calculation. This program simulates the free-falling motion of an object and uses floating-point numbers for calculation. )
4. Image difference:
-int: int can be regarded as a discrete and inseparable integer point, corresponding to the integer position on the number axis.
-float: float can be regarded as a continuous and infinitely separable real number point, corresponding to any position on the number axis.
Example:
-int: I live in apartment building 10. I live in apartment building 10. )
-float: The last four digits of my mobile phone number are 3. 14 15. The last four digits of my phone number are 3. 14 15. )
5. Difference of influence scope:
-int: int is usually used to represent a small range of integers, which is usually limited by specific data types and machine architecture.
-float: float can represent a wide range of values, usually with a larger range of valid digits.
Example:
-int: This program calculates the binary representation of integers, limited to 32 bits. (This program calculates the binary representation of integers, limited to 32 bits. )
-float: this program simulates the evolution of the universe in astrophysics, and uses floating-point numbers to represent a very large range of physical quantities. This program simulates the evolution of the universe in astrophysics, and uses floating-point numbers to represent huge physical quantities. )