Mixed Type Assignment

Problems often occur with mixed-type arithmetic; the rules for type conversion are given below.

• LHS INTEGER; RHS REAL or DOUBLE PRECISION -- the RHS is evaluated, truncated (all the decimal places lopped off) then assigned to the LHS.
• LHS REAL or DOUBLE PRECISION; RHS INTEGER -- the RHS is coerced and stored (approximately) in the LHS.

For example,

    REAL a, b; INTEGER i, j
    a = 3.0; b = 4.0
    i = b - a
    j = -0.9
    a = j

• b - a would be around 1.0; due to truncation i would be 0 or 1.
• j would be truncated to 0.
• a would be set to (about) 0.000.

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