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To convert an integer to floating point, use the function float
.
This returns number converted to floating point.
If number is already a floating point number, float
returns
it unchanged.
There are four functions to convert floating point numbers to integers; they differ in how they round. These functions accept integer arguments also, and return such arguments unchanged.
This returns number, converted to an integer by rounding towards zero.
This returns number, converted to an integer by rounding downward (towards negative infinity).
If divisor is specified, number is divided by divisor
before the floor is taken; this is the division operation that
corresponds to mod
. An arith-error
results if
divisor is 0.
This returns number, converted to an integer by rounding upward (towards positive infinity).
This returns number, converted to an integer by rounding towards the nearest integer. Rounding a value equidistant between two integers may choose the integer closer to zero, or it may prefer an even integer, depending on your machine.