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switch statement

(1) switch statement
#include <stdio.h>

int main()
{
    int n1 = 3;
    char op = '-';
    int n2 = 2;

    int result = 0;

    switch (op)
    {
    case '+':
        result = n1 + n2;
        break;
    case '-':
        result = n1 - n2;
        break;
    }
    printf("result: %d\n", result);

    return 0;
}
#!/usr/bin/env rdmd

import std.stdio;

void main()
{
    int n1 = 3;
    char op = '-';
    int n2 = 2;

    int result = 0;

    switch (op)
    {
    case '+':
        result = n1 + n2;
        break;
    case '-':
        result = n1 - n2;
        break;
    default:
        break;
    }
    writefln("result: %s", result);
}
  • break is optional (falls over if missing)
  • default branch is optional
  • compile error if break is missing
  • default branch must be present

Output:

result: 1
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Page last modified on 2025 June 21, 23:18