What is the size of float in a 32-bit compiler?

Akash Lawaniya • 9.58K Points
Tutor III

Q. What is the size of float in a 32-bit compiler?

(A) 8
(B) 4
(C) 2
(D) 1

Correct Answer - Option(B)
Views: 151
Filed under category C Programming

Explanation by: Mr. Dubey

In a 32-bit compiler, the size of a float data type is 4 bytes (32 bits) because:
A float in C follows the IEEE 754 single-precision floating-point standard, which uses:1 bit for the sign
8 bits for the exponent
23 bits for the mantissa (fraction)
Verification with C Code:
You can check the size of float using:
#include <stdio.h>
int main() {
    printf("Size of float: %zu bytes\n", sizeof(float));
    return 0;
}
Output:
Size of float: 4 bytes
Final Answer:
✅ (B) 4