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:@sprintf

@sprintf("%Fmt", args...)

Return @printf formatted output as string.

julia> s = @sprintf "this is a %s %15.1f" "test" 34.567;

julia> println(s)
this is a test            34.6

Examples

In the Julia programming language, the @sprintf macro is used for formatted string interpolation.

1. Basic usage:

   julia> @sprintf("The value of pi is %.2f", π)
   "The value of pi is 3.14"

   This example uses @sprintf to interpolate the value of π into a formatted string. The format specifier %.2f is used to display the value of π with two decimal places.

2. Interpolate multiple values:

   julia> x = 10;
   julia> y = 20;
   julia> @sprintf("The sum of %d and %d is %d", x, y, x + y)
   "The sum of 10 and 20 is 30"

   Here, @sprintf is used to interpolate multiple values into a formatted string. The format specifiers %d are used for integer values.

3. Use format specifiers for different types:

   julia> name = "Alice";
   julia> age = 30;
   julia> @sprintf("%s is %d years old.", name, age)
   "Alice is 30 years old."

   This example demonstrates the use of %s for string interpolation and %d for integer interpolation.

Common mistake example:

julia> @sprintf("The value of pi is %.2f", "π")
ERROR: MethodError: no method matching sprintf(::String, ::String)

In this example, the value being interpolated ("π") is a string instead of a numeric value. @sprintf expects numeric values to be interpolated with format specifiers like %f or %d. Make sure to provide the appropriate type of value for interpolation to avoid such errors.

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