Which data type can hold more significant digits, float or double?

The data type that can hold more significant digits is double. This type is designed to store floating-point numbers with greater precision compared to float. Specifically, a float typically uses 32 bits of memory, which allows for about 7 significant digits, while a double uses 64 bits, providing approximately 15 to 16 significant digits. This increased precision is particularly useful in applications requiring high-level numerical computations, such as complex mathematical models or GIS data analysis, where accurate representation of decimal values is critical.

The other options, like integer, represent whole numbers and do not accommodate decimal values at all, while decimal can offer higher precision for monetary calculations in some contexts, it is not generally as versatile as double for various scientific and engineering applications. Consequently, double is the preferred choice for applications that demand higher precision in floating-point arithmetic.