1 Ucode implements C-style if/else conditions and ?: ternary statements. 2 3 Like with for- and while-loops, an alternative syntax form suitable 4 for template blocks is supported. 5 6 7 -- Expect stdout -- 8 This should print "one": 9 one 10 11 This should print "two": 12 two 13 14 Multiple conditions can be used by chaining if/else statements: 15 three 16 17 If the conditional block consists of only one statement, the curly 18 braces may be omitted: 19 two 20 21 An if-condition using the alternative syntax: 22 Variable x has another value. 23 24 25 An if-condition using the special "elif" keyword in alternative syntax mode: 26 Variable x was set to five. 27 28 29 Ternary expressions function similar to if/else statements but 30 only allow for a single expression in the true and false branches: 31 Variable x is one 32 -- End -- 33 34 -- Testcase -- 35 This should print "one": 36 {% 37 x = 0; 38 39 if (x == 0) { 40 print("one"); 41 } 42 else { 43 print("two"); 44 } 45 %} 46 47 48 This should print "two": 49 {% 50 x = 1; 51 52 if (x == 0) { 53 print("one"); 54 } 55 else { 56 print("two"); 57 } 58 %} 59 60 61 Multiple conditions can be used by chaining if/else statements: 62 {% 63 x = 2; 64 65 if (x == 0) { 66 print("one"); 67 } 68 else if (x == 1) { 69 print("two"); 70 } 71 else if (x == 2) { 72 print("three"); 73 } 74 else { 75 print("four"); 76 } 77 %} 78 79 80 If the conditional block consists of only one statement, the curly 81 braces may be omitted: 82 {% 83 x = 5; 84 85 if (x == 0) 86 print("one"); 87 else 88 print("two"); 89 %} 90 91 92 An if-condition using the alternative syntax: 93 {% if (x == 1): -%} 94 Variable x was set to one. 95 {% else -%} 96 Variable x has another value. 97 {% endif %} 98 99 100 An if-condition using the special "elif" keyword in alternative syntax mode: 101 {% if (x == 0): -%} 102 Variable x was set to zero. 103 {% elif (x == 1): -%} 104 Variable x was set to one. 105 {% elif (x == 5): -%} 106 Variable x was set to five. 107 {% else -%} 108 Variable x has another value. 109 {% endif %} 110 111 112 Ternary expressions function similar to if/else statements but 113 only allow for a single expression in the true and false branches: 114 {% 115 x = 1; 116 s = (x == 1) ? "Variable x is one" : "Variable x has another value"; 117 118 print(s); 119 %} 120 121 -- End --
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