Getting Started Programming in C

Section 1.1 Getting Started Programming in C

Which of the following statements are true about variable and type determination in C and Python?

In C, variables must be explicitly declared with their data types, while in Python, variables are dynamically typed and their data types are determined at runtime.
Correct!
Both C and Python require explicit variable declarations with predefined data types.
Incorrect. C requires explicit variable declarations while Python does not.
In Python, variables are declared using the "var" keyword, while C uses the "int" keyword for integer variables and "char" for character variables.
Incorrect. The "var" keyword is used in other languages like Pascal, not Python!

Which of the following statements are true about running C and Python programs?

Both C and Python code are interpreted line-by-line during execution, eliminating the need for compilation.
Incorrect.
C code needs to be compiled into a binary executable before it can be run, while Python code is interpreted line-by-line during execution.
Correct! This is a fundamental difference between C and Python programs!
C code is compiled into Python bytecode, which is then executed by the Python interpreter.
Sorry, incorrect! Did you know that Python was originally implemented in C?
Python code is compiled directly into a binary executable, similar to C.
Incorrect!

C code must be compiled before it is executed. Which of the following are advantages of requiring a compiler to compile your code before execution?

Compiled code is transformed into machine code that runs more efficiently on the target platform.
Correct!
Compilers analyze code and apply various optimizations during the compilation process.
Correct!
Once code is compiled, the resulting binary can be executed on the target platform without needing access to the source code.
Correct!
Once compiled, the resulting binary executable can run on any architecture.
A compiler targets a specific architecture, producing a binary executable that is designed to run on that architecture.

Rewrite the following Python program into C:.

def main:	    
     result = 1 + 2
     print("%d" %(result))

main()

Answer.

See below for the solution:

int main(void) { 
    int result;

    result = 1 + 2;
    printf("%d\n", result);

    return 0;
}