INTERVIEW QUESTIONS C OPERATORS IN C DETAILS

Question: Why n++ executes faster than n+1?

Answer: The expression n++ requires a single machine instruction such as INR to carry out the increment operation whereas, n+1 requires more instructions to carry out this operation.

The expression n++ requires a single machine instruction such as INR to carry out the increment operation whereas, n+1 requires more instructions to carry out this operation. Source: CoolInterview.com

The expression n++ requires a single machine instruction such as INR to carry out the increment operation whereas, n+1 requires more instructions to carry out this operation.
If n+1 is executed,the value of n should be stored in memory,then bring to CPU and perform addition in CPU and then write to memory back.Hence,CPU time is consumed more.
Compilers nowadays are smarter,if it encounters n+1,it replaces it by n++.Hence,it really doesn't matters for user since optimization is gained by compiler. Source: CoolInterview.com

n++ requires only to increment the value of n by one,while n=n+1 means first add 1 to the n and then perform the assignment operation =
thus it requires two tasks to be performed while n++ requires only one task to be performed. Source: CoolInterview.com

It depends on the target architecture. If the architecture does not support the INC/ DEC instruction, then n++ and n = n +1 will be same. Means, same kind of instruction will be generated. Source: CoolInterview.com

all high level lang are converted first to machine instruction and its the machine instruction on which the speed of execution of our program depend so n=1 means use of add instr of var and store value it it too time taking so we prefer n++ for faster execution. Source: CoolInterview.com

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